I REALLY NEED HELP ON THESE QUESTIONS!!!! IM SOOO STUCK!!!!

A store is selling two mixtures of coffee beans in one-pound bags. The first mixture has 12 ounces of Sumatra combined with 4 ounces of Celebes Kalossi, and costs $15. The second mixture has 4 ounces of Sumatra and 12 ounces of Celebes Kalossi, and costs $21. How much does one ounce of Sumatra and one ounce of Celebes Kalossi cost?

Answers

Answer 1

x = price Sumatra, y = price Celebes

12*x + 4*y=15

4*x + 12*y = 21

Now, solve it. For instance (there are many ways):

Multiply the second equation by (-3):

12*x + 4*y=15

-12*x -36*y = -63

Sum them up (x cancel out. That's why we multiply by -3)

-32y=-48, y = 48/32=6/4=3/2

y = 3/2 and x = go to any equation. Say the second again:

4*x + 12*y = 21

4x + 12*3/2 =21 ----> 4x + 18=21, 4x = 3, x = 3/4.

So cost of Sumatra $ 3/2 per oz, or $ 1.50

Cost of Celebes Kalossi (what a name!) $ 3/4 per oz = $ 0.75 per oz

Let's check it with the first equation:

12*0.75+4*1.5 = 15!

Clear?

Related Questions

f(x)=5x^2 + 9x-4 g(x)= -8x^2-3x-4 find (f+g)(x)

Answers

It's -3x^2+6x-8 since you just add like terms that they both have

Which function below has the following domain and range?
Domain:
{−9,−5,2,6,10}
Range:
{−2,0,8}
Select one:
a.
{(−2,−5),(8,10),(0,6),(−2,−9),(0,2)}
{(−2,−5),(8,10),(0,6),(−2,−9),(0,2)}
b.
{(−9,10),(−2,8)}
{(−9,10),(−2,8)}

c.
{(−9,−2),(−5,0),(2,8),(6,5),(10,9)}
{(−9,−2),(−5,0),(2,8),(6,5),(10,9)}

d.
{(2,0),(−5,−2),(10,8),(6,0),(−9,−2)}
{(2,0),(−5,−2),(10,8),(6,0),(−9,−2)}

Answers

domain (ur x values) are { -9,-5,2,6,10)
range (ur y values) are { -2,0,8}

ur answer is : D

Answer:

The correct option is d.

Step-by-step explanation:

Domain is the set of all possible inputs or the values of x and the range is value of output or y.

In option a,

The given function is

{(−2,−5),(8,10),(0,6),(−2,−9),(0,2)}

Domain = {-2,0,8}

Range = {-9,-5,2,6,10}

Therefore option a is incorrect.

In option b,

The given function is

{(−9,10),(−2,8)}

Domain = {-9,-2}

Range = {8,10}

Therefore option b is incorrect.

In option c,

The given function is

{(−9,−2),(−5,0),(2,8),(6,5),(10,9)}

Domain = {-9,-5,2,6,10}

Range = {-2,0,5,8,9}

Therefore option c is incorrect.

In option d,

The given function is

{(2,0),(−5,−2),(10,8),(6,0),(−9,−2)}

Domain = {-9,-5,2,6,10}

Range = {-2,0,8}

Therefore option d is correct.

the discriminant of a quadratic equation is negative. one solution is 2+3i. what is the other solution?

Answers

negative means it has 2 non-real roots

we assume that the coefients of the equation are real so therefor

if a+bi is a root then a-bi is also a root

if 2+3i is a root then 2-3i is also a root (solution)

the other solution is 2-3i

Answer:

2-3i

Step-by-step explanation:

Need help fast!
The table shows the relationship between the number of drops of food color added to different number of cups of cake frosting. Look at the first picture.

Which point below shows an equivalent ratio in this situation? Look at the second picture.

A. Point B, because if cups of frosting are 50, then drops of food coloring will be 200
B. Point B, because if drops of food coloring are 50, then cups of frosting will be 200
C. Point J, because if cups of frosting are 40, then drops of food coloring will be 10
D. Point J, because if drops of food coloring are 40, then cups of frosting will be 10

Answers

Answer: A) Point B, because if cups of frosting are 50, then drops of food coloring will be 200.

This is because the proportion of frosting to food coloring is 1:4, and if the answer to A is simplified (50:200), the ratio would be the same.

Answer:

Option A. will be the answer.

Step-by-step explanation:

From the given table we will find the relation first and the we will try to find the point with the same relation in the graph.

From the given table ratio of Cups of frosting and Drops of food color is = [tex]\frac{\text{Cups of frosting}}{\text{Drops of food color}}[/tex]

= [tex]\frac{2}{8}[/tex]

= [tex]\frac{1}{4}[/tex]

Or 1 : 4

Now the point B shows the ratio between food color and frosting = [tex]\frac{\text{Cups of frosting}}{\text{Drops of food color}}[/tex]

= [tex]\frac{\text{x-coordinates}}{\text{y-coordinates}}[/tex]

= [tex]\frac{50}{200}[/tex]

= [tex]\frac{1}{4}[/tex]

The same ratio 1 : 4

Option A. will be the answer.

y = 7x - 53 y = -4x + 35 a. ( -3, -8) c. ( -8, 3) b. ( 8, 3) d. No solution

Answers

Hi there !

Y = 7x - 53
Y = -4x + 35

I always used substitution to solve equations so we gonna use it here as well :)
-----------------------------------------------------------------------------------------------------

We gonna solve y = 7x - 53 for y
Let's start by substitute 7x - 53 for y in y = -4x + 35
y = -4x + 35
7x - 53 = -4x + 35
Common terms
7x + 4x = 35 + 53
11x = 88
divide both sides by 11
11x/11 = 88/11
x = 8
Now, since we have the value for x, it will be easier for us to find Y. So, we gonna use the value of x which is 8 to find y.
In order to find the value for y, we must substitute 8 which is the value for x in y = 7x - 53
y = 7(8)-53
y = 56 - 53
y = 3

The final answer is : X = 8 and Y= 3
-------------------------------------------------------------

The correct option is B
(8,3)

---------------------------
I hope that helps!

Misha’s family bought a large cattle farm. The number of acres of the cattle farm is the cube of the acres they used to own plus 10 acres. If a represents the number of acres the family used to own, which expression represents the number of acres they own now?

Answers

It should be axaxa +10. Or a to the third plus 10

When positive integer x is divided by 11, the quotient is y and the remainder is 4. when 2x is divided by 8, the quotient is 3y and the remainder is 2. what is the value of 13y – x ?

Answers

[tex]\dfrac x{11}=y+\dfrac4{11}\iff x=11y+4[/tex]
[tex]\dfrac{2x}8=3y+\dfrac28\iff2x=24y+2[/tex]

[tex]\implies 2x-x=(24y+2)-(11y+4)[/tex]
[tex]\implies x=13y-2[/tex]
[tex]\implies 13y-x=2[/tex]

What is the range of the function y=2sin x

Answers

Answer:

Range: [-2, 2] {y | -2 ≤ y ≤ 2}

Step-by-step explanation:

The given function is y = 2sinx

We have to find the range of the given function.

Since at y-axis sine function has the variance between -1 to 1 so range of y = sinx is [-1, 1]

and if the amplitude of sine function is 2 then sine function will vary from -2 to 2 which implies that range of y = 2 sinx will be [-2, 2]

So range of y = 2sinx is [-2, 2]

The range of the function y=2sin x is mathematically given as

dy=(-2,2)

What is the range of the function y=2sin x?

Question Parameter(s):

function y=2sin x

Generally, the equation for the wave is mathematically given as

[tex]y(x,t)=Asin(kx−wt+\phi)[/tex]

Therefore, Comparing both equations

y(x,t)=Asin(kx−wt+\phi)

y=2sin x

We have

A=2

In conclusion, The range of a function y=2sin x is simply defined as the probable outcomes, with x values as independent factors.

Hence, with sinx having min and max values at (-1,1)

The y value range will be

dy=(2(-1),2(1))

dy=(-2,2)

Answers

The range is the set of images; so, as you have the domain set and the function rule, you just have to calculate the value of the function for each value of the domain:

Domain        image, f(x) =x^2 - 6x + 4

-3                (-3)^2 - 6(-3) + 4 = 9 + 18 + 4 = 31

0                 (0)^2 - 6(0) + 4 = 0 - 0 + 4 = 4

5                  (5)^2 - 6(5) + 4 = 25 - 30 + 4 = - 1

So, we got the images -1, 4, and 31 and that is that is the range {-1, 4, 31}

Answer: option C. {-1, 4 , 31}

Petrolyn motor oil is a combination of natural oil and synthetic oil. it contains 5 liters of natural oil for every 6 liters of synthetic oil. if 498 liters of synthetic oil are used, how many liters of petrol oil will be made

Answers

In this problem, we use the method of ratio and proportion. This technique works by using the concept that there is a fixed ratio of compositions within a mixture. Speaking generally, there is a fixed ratio of the parts of the whole. So, all we have to do is equate both ratios.

5 L natural oil/ 6 L synthetic oil = x L natural oil/498 L synthetic oil
x = 415 L natural oil

So, if petrol oil contains 498 L synthetic oil, it has a corresponding amount of 415 natural oil. Adding these two would be the total volume of the petrol oil. That would be 415+498 = 913 L petrol oil.

In a computer game, when choosing a character there are 5 choices for hair style, 3 choices for eye color, and 7 choices for outfits. How many different characters are possible if you were to choose 1 hair style, 1 eye color, and 1 outfit?
105
140
22
15

Answers

Hey there!

If there are 5 choices for a hairstyle, that means that there are 5 options per 1 eye color. This totals out to 15 options (3 × 5) total for eye color and hairstyle combinations.

For each of those combinations, there are an additional 7 options for an outfit. That means that there is a total of 105 options (7 × 15) available to choose from.

Hope this helped you out! :-)

Factor the following.

Answers

x^2 - 10x + 25
(x + 5)(x - 5)

The answer is B (x-5) (x+5)

Hope this helps :)
Please give brainliest

This is square of a binomial.

x² is the square of x and 25 is the square of -5

-10x is given by 2(x*-5)

Your final answer is (x-5)²

How many times bigger is a metric ton than a kilogram?

Answers

The unit ton, or metric ton, is a non-SI unit but commonly used in the United States. It is both approved by the NIST and the U.S National Institute of Standards and Technology. The equivalence is, 1 metric ton is equal to 1,000 kilograms. So, a metric ton is a thousand times bigger than a kilogram.

If an eagle and a bumblebee are traveling at 8 km/hr, which has more momentum explain

Answers

The eagle would have more momentum because it has a larger mass.

Determine whether the formula describes y as a function of x. Explain your reasoning.

y = -x

Answers

cause y=mx+b should be the set up

Bret is starting a business selling handmade necklaces. He has decided to invest and initial amount of $387 for advertising and materials cost seven dollars for each necklace he makes. Bret can sell his creations for $10 per necklace.once he makes and sells a certain number of necklaces he will break even with identical expenses and sales. How many necklaces would that take? What would the total expenses and sales be then?

Answers

alrighty

each necklace costs him 7 dollars but he gets 10 dollars from selling them
so his profit per necklace=10-7=3 per necklace

so we want to find how many necklaces he needs to make and sell to cover the initial investment

the cost is 387
divide it by the profit per necklace
387/3=129
needs to make 129 necklaces
the total expenses would be equal to the total sales
ok, the sales are 10 dollars and 129 necklaces so total sales is 1290 dollars and so then the expenses are 1290 dollars

129 necklaces
total expensese is $1290
total sales is $1290

Final answer:

To break even, Bret would need to make and sell 40 necklaces, with a total expense of $15,760 and total sales of $400.

Explanation:

To determine the number of necklaces Bret needs to make and sell to break even, we need to consider his initial investment and the expenses and sales associated with each necklace.

First, let's calculate the total expenses for each necklace: $7 (materials cost) + $387 (initial investment) = $394.

Next, let's calculate the total sales for each necklace: $10 (selling price).

To break even, the total expenses and total sales need to be equal.

Let n represent the number of necklaces:

Total expenses = $394 * n

Total sales = $10 * n

Setting the two equations equal to each other, we have: $394 * n = $10 * n.

Now, let's solve for n:

$394 * n = $10 * n

$394 = $10

n = 394 / 10

n = 39.4

Since we cannot sell a fraction of a necklace, Bret would need to make and sell 40 necklaces to break even.

The total expenses for 40 necklaces would be $394 * 40 = $15,760, and the total sales would be $10 * 40 = $400.

Which relationship is always true for the angles x, y, and z of triangle MNP?
A. x + z = y
B. y + z = x
C. x + y + z = 180 degrees
D. x + y + z = 90 degree

Answers

It's C. The triangle angle sum theorem tells us that the angles of any triangle will always add up to 180 degrees.

-the answer would be C: "x+y+z= 180 degrees"

-and here is proof so you know you won't get the answer wrong

- hope you do good on your test, have a good day :)

Mind helping a brother here! 20 points! Thanks!

Answers

(a) Paco's chance of winning a gift card is reduced as there are fewer available gift cards to win.

(b) Im not sure about this one but if your chance of winning a gift card is less than 1% then I doubt that both brothers would win.

Help please! In the figure line a and line b are parallel based on the figure match each given angle with its congruent angles

Answers

∠3, ∠7, ∠6: angles congruent to ∠2
∠2 and ∠3 are vertical angles, ∠3 and ∠7 are corresponding angles, and ∠7 and ∠6 are vertical angles.

∠3, ∠7, ∠2: angles congruent to ∠6
∠2 and ∠3 are vertical angles, ∠3 and ∠7 are corresponding angles, ∠7 and ∠6 are vertical angles.

∠4, ∠8, ∠5: angles congruent to ∠1
∠1 and ∠4 are vertical angles, ∠4 and ∠8 are corresponding angles, ∠8 and ∠5 are vertical angles.

Answer: copy the guy on top of me but the last one for PLATO users is <3,<6,<2 is angles congruent to <7

Step-by-step explanation: bec I said so

About 15% of the population of a large country is allergic to pollenallergic to pollen. if two people are randomly selected, what is the probability both are allergic to pollen? what is the probability at least one is allergic to pollenallergic to pollen?

Answers

P(allergic) = 0.15

P(both are allergic to pollen) = (0.15)² = 0.0225 (you can use the binomial probability also)

Q(NOT allergic to pollen) = 1 - 0.0225 = 0.9775
Binomial probability

Probability of NEITHER is allergic
ⁿCₓ(p)ˣ(q)ⁿ⁻ˣ
²C₀(0.15)⁰(0.9775)² = 0.9555

P(at LEAST ONE is allergic) = 1- 0.9555 = 0.0444

Answer:

(a) 0.0225

(b) 0.225

Step-by-step explanation:

It is given that 15% of total population is allergic to pollenallergic to pollen.

Thus, Probability of an individual s/he has allergy is 0.15

Thus, The probability that two person is selected and both has allergy is 0.15 × 0.15 = 0.0225

And the Probability that at least one person is suffered from allergy from that two person = P(allergic and non-allergic) + P(non-allergic and allergic)

⇒ 0.15 × (1 - 0.15) + (1 - 0.15) × 0.15

⇒ 0.15 × 0.85 + 0.85 × 0.15 = 0.225

The speed of light is about nine hundred eighty million feet per second. What is that speed in scientific notation?

Answers

Nine hundred eighty million is 9.8 x 10^8, which is the bottom left option.

I hope you are satisfied with my answer.

Answer:

The answer is 9.8*10^8

i think

Step-by-step explanation:

The perimeter of a rectangular field is 376 yards. if the width of the field is 89 yards, what is its length?

Answers

The length of the field will be calculated as:
P=2(L+W)
P=376
W=89
thus substituting the values in the equation we get;
376=2(L+89)
376/2=(L+89)
solving for L;
188=L+89
L=188-89
L=99 yards
therefore the length is 99 yards

Answer:

Step-by-step explanation:

The length of the field will be calculated as:

P=2(L+W)

P=376

W=89

thus substituting the values in the equation we get;

376=2(L+89)

376/2=(L+89)

solving for L;

188=L+89

L=188-89

L=99 yards

therefore the length is 99 yards

Gina mixed paint to make her favorite shade of purple. She filled up one third of the container with red paint. Then she filled the remaining space with 4 Liters of blue paint.How many milliliters of paint did Gina mix

Answers

If the red is one third full, and it takes 4 more liters of blue, than there are 6 liters total to make the paint purple. Because if 4 liters is 2/3 then that makes the amount of red 2 liters.

The process of moving a figure to a different location is called:
mapping.
transformation.
isometry.
None of the choices are correct.

Answers

The process of moving a figure to a different location is called TRANSFORMATION.

By the empirical rule, what percentage of the area under the normal curve lies to the left of mu, the average? put your answer as a percentage.

Answers

The normal curve is a bell shaped curve which is symmetric about μ (the population mean), as shown below.
When the curve is plotted against the normalized coordinate z, the curve is symmetric about z=0, which coincides with μ.

Because the total area under the curve is 1, each half of the curve about the line of symmetry has an area of 0.5.
Ths means that 50% of the normal curve lies to the left of μ.

Answer: 50%

Which of the following indicates that the roots of a quadratic are irrational
a) discriminant is zero
b) discriminant is negative
c) discriminant is rational
d) discriminant is prime

Answers

answer would be D You can have a rational discriminant for an irrational root, but you can also have rational discriminant for a rational root. So C is partially correct.

All prime discriminants will result in an irrational root, but not all irrational roots have prime discriminants

What type of triangle has side lengths 2, √11, and √15? please leave details as to how you got to your conclusion im confused

Answers

Let "a", "b" and "с" be sides of the triangle ("с" is the longest side). The triangle will be:
right if a² + b² = c²
аcute if a² + b² > c²
obtuse if a² + b² < c²

We have a=2, b=√11 and c=√15

2² + (√11)² = 4 + 11 = 15
and
(√15)² = 15

15 = 15 ⇒ right triangle.

Hope this helps.

Answer:

right triangle.

Step-by-step explanation:

The given length of the three sides of the triangle are

[tex]2,\sqrt{11},\sqrt{15}[/tex]

We will now check whether these three numbers are Pythagorean triple or not. If it is a Pythagorean triple then the triangle will be a right triangle.

Pythagorean triple:- If the sum of square of any two sides is equal to the square of the third side then the lengths are Pythagorean triple and the triangle is a right triangle.

Now, we do the below operation:

[tex]2^2+(\sqrt{11})^2\\\\=4+11\\\\=15[/tex]

Now, let us square the third side

[tex](\sqrt{15})^2\\\\=15[/tex]

Since, we got both values equal. Hence, the length of sides are Pythagorean triple.

And therefore, the triangle is right triangle.

the answers are
A. 15
B. 14
C. 16
D. 19

Answers

Your answer is A. 15

6a+10 = 3a+ 55

6(15) + 10 = 3(15) + 55

6x 15 = 90 + 10 = 100
3 x 15 = 45 + 55 = 100

hope this helps

Given the parent function of f(x) = x3, what is the value of k in the translated graph of f(x − h) + k?

Answers

we have

[tex]f(x)=x^{3}[/tex]

we know that

The point [tex](0,0)[/tex] in the graph of f(x) is the point [tex](3,2)[/tex] in the translated graph

The rule of the translation is

[tex](x,y)----> (x+3,y+2)[/tex]

That means

The translation is [tex]3[/tex] units to the right and [tex]2[/tex] units up

The equation of the translated graph is equal to

[tex]f(x)=(x-3)^{3}+2[/tex]

therefore

The answer is

the value of k is equal to

[tex]k=2[/tex]

see the attached figure to better understand the problem

Answer:

k=2

Step-by-step explanation:

I just did the assignment

7x1,000,000+
3x100,000+
5x10,000+
6x1.00+
2x100+3x10+7+1

Answers

When wording your problem, parenthesis would have helped to make sure that the problem was solved in the correct order of operations as it was intended to, but here is your answer from the way I solved it:
7350244

8700316.1 that your answer

Other Questions

Choosing your own career is an example of the economic goal of _______________. What elements should be included in a character sketch? A(n) _________ person is free from mental illness, has a desire to try new things, and high self esteem.A.emotionally healthyB.mentally healthyC.spiritually healthyD.environmentally healthy what is the relationship between the 3s in 9338 What aspect of the myth of the Weeping Woman, or La Llorona, does not appear in Ana Castillos modern retelling? A.The Weeping Woman is seen as an evil character whose punishment is justified. B.Some of the characters in the story gain familiarity with the spirit world. C.The Weeping Woman is doomed to wander the world looking for her children. D.There are characters whose names mean "hope," "faith," "charity," and "the madwoman." After positive pressure ventilation, a newborn's heart rate increases from 80 to 120 beats per minute. the emt should: Henry is an adolescent who experiences sleep deprivation, which makes him more likely to experience _____. a child is 2-1/2 feet tall. the child's mother is twice as tall as the child. how tall is the child's mother? A total of 822 tickets were sold for the school play. They were either adult tickets or student tickets. They were 72 more student tickets sold then adult tickets. How many adult tickets were sold? Short vowel of hamper 20 POINTS!!! WRONG ANSWERS WILL BE REPORTED!! A scientist observes one chimpanzee using sticks and leaves to pull ants out of anthills. The scientist concludes that all chimpanzees use tools. Why should you be skeptical of the conclusion? Q25. How does the New seafloor form at the mid-ocean ridge? A video game club charges a fixed annual membership fee of $20 and $2 per video game rented. Let f(n) represent the total annual cost of renting n video games. Which of the following functions best represents the relationship between f(n) and n if the membership was increased by $15 the next year?f(n) = 2n + 35 f(n) = 20n + 2 f(n) = 10n + 35 f(n) = 2n + 10 How did nationalism and militarism contribute to conflicts among nations in Europe? in world war 1 A monomial term has the form ax^n where the coefficient is a and the degree is When a crew rows with the current, it travels 18 miles in 3 hours. Against the current, the crew rows 6 miles in 3 hours. Let x=the crew's rowing rate in still water and let y = the rate of the current. Find the rate of rowing in still water and the rate of the current. If you are given a circle with center c, how do you locate the vertices of a square inscribed in circle c? You're setting sales goals for next month. You base your goals on previous average sales. The actual sales for the same month for the last four years have been 24 units, 30 units, 23 units, and 27 units. What is the average number of units you can expect to sell next month? A. 26 B. 28 C. 30 D. 104 Chain of events is a type of _____ relationship. circular causal unsound invalid Steam Workshop Downloader