To find the new number of counters in each bag, subtract 5 from bag a and add 5 to bag b.
Explanation:The subject of this question is mathematics. In this question, we are given two bags, bag a and bag b, which contain 7x and 2x counters respectively. Five counters are taken from bag a and put in bag b.
To find the new number of counters in each bag, we subtract 5 from bag a and add 5 to bag b:
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Solve the below system of equations using the linear combination method. Show all your work, explaining each step in solving the system using the linear combination method.
2x + 3y = 1
y = -2x - 9
The solution of the system of equations is (-7 , 5)
Step-by-step explanation:
The steps of the linear combination method are:
Make the coefficients of one variable in the two equations same in values and different in signsAdd the two equations to eliminate that variable and make one equation of the other variableSolve the equation to find the other variableSubstitute its value in any one of the two equations to find the variable that eliminate before∵ 2x + 3y = 1 ⇒ (1)
∵ y = -2x - 9
- Add 2x to both sides
∴ 2x + y = -9 ⇒ (2)
Multiply equation (2) by -1 to make the coefficients of x opposites
∴ -2x - y = 9 ⇒ (3)
Add equations (1) and (3) to eliminate x
∴ 2y = 10
Divide both sides by 2
∴ y = 5
Substitute the value of y in equation (1) or (2) to find x
∵ 2x + 5 = -9
- Subtract 5 from both sides
∴ 2x = -14
- Divide both sides by 2
∴ x = -7
The solution of the system of equations is (-7 , 5)
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Antonio has $350 to spend on skis. Sales tax is 6%. Decide if each description of a price and discount, plus sales tax, represents a pair of skis that Antonio can purchase with the money he has .
Choose Yes or No for each description
a. 25% off $450 Yes or No
b. 20% off $385 Yes or No
c. $20 off $360 Yes or No
d. 15% off $380 Yes or No
e. $10 off $340 Yes or No
Answer:
False
Step-by-step explanation:
John’s dog weighed 7 pounds when he got him. The dogs weight tripled each year for two years. How many ounces did John’s dog now weigh?
Answer:
Step-by-step explanation:
1st year- 7*3=21
2nd year- 21*3=63
I need help please and thank you
Answer:30
Step-by-step explanation:
Answer:
I think the correct answer is
A- 40
B- 40
Which property of multiplication is shown?
g • h = h • g
Commutative property of multiplication
My explanation is attached in the image provided.
A circle has a diameter of 3.6cm.
What is it’s radius?
Answer:
1.3
Step-by-step explanation:
Radius is half of a diameter so you just need to divide 3.6 by 2
Answer:
1.8
Step-by-step explanation:
The formula for diameter and radius is 2r = d, if we solve this equation we get 2r = 3.6 So, divide 3.6 by 2 and you got your answer!
Ann works in a supermarket for $10.00 per hour. If her pay is increased $12.00, then what is her percent increase in pay
Answer: 20%
Step-by-step explanation:
Percentage increase = increase / original value x 100
Increase = $12.00 - $10.00 = $2
Therefore :
% increase = [tex]\frac{2}{10}[/tex] x 100
% increase = 20
Answer:
20%
Step-by-step explanation:
12.00 - 10.00 = 2.00
2 divided by 10 = 0.2
100 multiplied by 0.2 which gives you 20%
A 100-gram sample of a radioactive isotope decays at a rate of 6% every week. How much of the sample will be left one year from now?
4 grams sample will be left after 1 year
Step-by-step explanation:
The decay function for percentage decay is given by:
[tex]y =a (1-r)^x[/tex]
Here,
a is the initial value
r is the rate
x is the number of time periods
Given
Initial value = 100 grams
Rate = 6% = 0.06
Time = 1 year = 52 weeks
Putting the values in the formula
[tex]y = 100 (1-0.06)^{52}\\y = 100(0.94)^{52}\\y = 4.00\ grams[/tex]
Hence,
4 grams sample will be left after 1 year
Keywords: Decay, percentage
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1. What is the difference between a median of a triangle and an altitude?
Answer:
The difference between a median and altitude of a triangle is given below :
Altitude is the perpendicular line drawn from a vertex of a triangle to its opposite side .But a median of a triangle is a segment connecting a vertex to the midpoint of its opposite side.
Step-by-step explanation:
The difference between a median and altitude of a triangle is given below :
Altitude is the perpendicular line drawn from a vertex of a triangle to its opposite side .But a median of a triangle is a segment connecting a vertex to the midpoint of its opposite side.
The handford high school basketball team scored 79, 68, 86, 91 and 72 points in their first five games. What was the average number of points scored in these five games?
Answer: 79.2 points
Step-by-step explanation: The word "average" is the same as the word "mean" so to find the average of the points scored in their first 5 games, we want to add up all the points and divide them by the number of games they played which is 5 games.
Let's begin by adding the numbers.
79 + 68 + 86 + 91 + 72
Adding these numbers, we get a sum of 396.
This will be divided by how many games they played which is 5.
396 ÷ 5 = 79.2
This means that the average number of points scored is 79.2 points which could round down to 79 points but don't round unless the problem asks.
Find the sum 45+46+47+48...+135+136
Answer:
457
Step-by-step explanation:
I add all the numbers I could see and got 457.... i need more information hope this helps
Arianna is saving money for college so she invests $1,000 into a savings account that earns interest every year. If the amount in the savings account is represented by the function
9x2+50x+1000, where x is the number of years. How much money does Arianna have in her account after 6 years?
Answer: $1,624
Step-by-step explanation:
The amount after x-years is given as :
9[tex]x^{2}[/tex] + 50x + 1000
Since x represents number of years , this means that after 6 years , the amount will be :
9([tex]6^{2}[/tex] ) + 50(6) + 1000
⇒9(36) + 300 + 1000
⇒324 + 300 + 1000 =
Therefore, the amount after 6 years will be $1,624
Does anyone know this??
Answer:
z = 65°
y= 105°
Step-by-step explanation:
angle z is adjacent to 115° on a straight line, hence they are supplementary angles, i.e they add up to 180°
hence,
z + 115° = 180°
z = 180° - 115° = 65°
recall that the sum of angles inside a convex quadrilateral always adds up to 360°
i.e z + y + 102° + 88° = 360° (we know z from above)
65 + y +102+88=360
y = 360 -65-102-88 = 105°
List the numerical coefficient of each term in the expression.
6.9x343 -0.55x?y +2.65
6.9 for X and -0.55 for X and 1 for Y
Step-by-step explanation:
The numerical Coefficient is said to be the fixed number that is in multiple with the variable. If the number is not with the variable then it is not taken into account.
STEP 1:
6.9 is the coefficient for X
STEP 2:
-0.55 is the coefficient for x
STEP 3:
1 is the coefficient for y
STEP 4:
343 a 2.65 not considered as the don't have the variables.
A power regression equation for this data is: t = a^
Answer:
1.5
Step-by-step explanation:
Answer:
The person above is right.
Its: T = A^ 1.5
Step-by-step explanation:
Graph the planet data, shown right, using the regression calculator. When you are done, click “Resize window to fit data.”
Mercury and Venus are
✔ closer to
the sun than Earth is.
So, their orbital periods are
✔ shorter
than Earth's orbit.
The further a planet is from the sun, the
✔ longer
its orbit is.
A power regression equation for this data is:
T = A^
1.5
I took it and got it right.
Hardcover books cost $8 and paperbacks cost $3. John buys 15 books for $70. How many of each book type did he buy?
Answer:
10 paperback and 5 hardcover books
Step-by-step explanation:
Please see attached picture for full solution.
Let's check:
total cost= 10(3) + 5(8)= $70 ✓
You could also try to solve the question by assuming John bought all paperback books first instead of all hardcover books. The answer should be the same.
To shift the graph of an equation a certain number of units __you need to
add that number to the function's equation.
O
A. down
O
B. up
SUBMIT
Answer:
Up
Step-by-step explanation:
Shifting a graph a number of units up is a vertical translation. So, in a vertical translation, we shift the graph up by adding a constant at the end of the function.
In any function [tex]f(x)[/tex]. If we add the constant [tex]d[/tex] at the end of the function, then this will shift graph of the function [tex]d[/tex] units up.
This diagram shows the dimensions of a metal piece used in a machine.
What is the volume of the metal piece?
Enter your answer in the box.
____mm³
Answer:
Volume of metal piece = 3680 mm³
Step-by-step explanation:
volume of horizontal cuboid:
V = l * b * h
= 30 * 8 * 8 = 1920 mm³
Volume of vertical cuboid:
breadth = 10 mm
Length = 14+8 = 22 mm
Height = 8 mm
V = 22 * 10 * 8
= 1760 mm³
Volume of metal piece = 1920 + 1760
= 3680 mm³
Answer:
3680
i got 100 on test
solve the equation 1/3m+6m-9/3m=3m-3/4m
The correct answer is option B, as the solution of the equation:
[tex]\frac{1}{3 m}+\frac{6 m-9}{3 m}=\frac{3 m-3}{4 m}[/tex] is [tex]\frac{23}{15}[/tex]
Solving this type of equation containing the fractions involves the mathematical operations like finding a common denominator, combining the fractions, eliminating the fraction denominators, cancelling common terms, distributing, adding/subtracting to both sides, simplifying, and dividing both sides by the same factor.
The Steps of calculation are as follows:
Let's verify the answer:
We had the equation:
[tex]\[\frac{1}{3m} + \frac{6m - 9}{3m} = \frac{3m - 3}{4m}\][/tex]
And we simplified it to:
[tex]\[\frac{6m - 8}{3m} = \frac{3m - 3}{4m}\][/tex]
Next, we cross multiplied:
[tex]\[4m(6m - 8) = 3m(3m - 3)\][/tex]
[tex]\[24m^2 - 32m = 9m^2 - 9m\][/tex]
We then brought all terms to one side:
[tex]\[24m^2 - 9m^2 - 32m + 9m = 0\][/tex]
[tex]\[15m^2 - 23m = 0\][/tex]
Factoring out m:
[tex]\[m(15m - 23) = 0\][/tex]
So, either m = 0 or 15m - 23 = 0.
If 15m - 23 = 0, then [tex]\(m = \frac{23}{15}\)[/tex].
Therefore, the correct answer is: b. [tex]\frac{23}{15}$[/tex].
How many gallons of 90% antifreeze must be mixed with 60 gallons of 15% antifreeze to get a mixture that is 80%?
390 gallons of 90 % antifreeze must be mixed with 60 gallons of 15% antifreeze to get a mixture that is 80%
Solution:
Let "x" be the gallons of 90 % antifreeze
60 gallons of 15 % antifreeze
Then, (x + 60) is the gallons present in final mixture that is 80 %
Therefore, x gallons of 90 % antifreeze is mixed with 60 gallons of 15 % antifreeze to get a mixture that is (x + 60) gallons of 80 %
Thus, a equation is framed:
90 % of x + 15 % of 60 = 80 % of (x + 60)
Solve the above equation for "x"
[tex]90 \% \times x + 15 \% \times 60 = 80 \% \times (x+60)\\\\\frac{90}{100} \times x + \frac{15}{100} \times 60 = \frac{80}{100} \times (x+60)\\\\0.9x + 0.15 \times 60 = 0.8(x + 60)\\\\0.9x + 9 = 0.8x + 48\\\\0.9x - 0.8x = 48 - 9\\\\0.1x = 39\\\\ x = 390[/tex]
Thus 390 gallons of 90 % antifreeze must be mixed
Write 1/10 and 1/10 as decimals to complete the expression.
Answer:0.2
Step-by-step explanation: 1/10 and 1/10
Simply means this in maths
1/10+1/10
0.1+0.1= 0.2
What is the arc length of the semicircle
Answer:
The arc length of the semicircle is half the circumference of the full circle
[tex]\bf \textit{circumference of a circle}\\\\ C=2\pi r~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=11 \end{cases}\implies C=2\pi (11)\implies C=22\pi \\\\\\ \stackrel{~\hfill \textit{a semicircle has half of that}}{C=\cfrac{22\pi }{2}\implies C=11\pi \implies C\approx 34.56}[/tex]
Can someone please help me with this question
Answer:
B, E
Step-by-step explanation:
It can be helpful to factor the first two terms:
f(x) = x^2(x -7) +36
This can make it easier to evaluate the function for different values of x.
The answer choices suggest you need to know whether f(5) and f(-14) match the values given here.
f(5) = 5^2(5 -7) +36 = -50 +36 = -14 . . . . matches choice B (and E)
f(-14) = (-14)^2(-14-7) +36 = -21(196) +36 . . . . does not match choice A (or D)
__
The one remaining answer choice we need to consider is C. If we look at f(0) for this equation, we find it is (-5)(-10) +14 = 64, which does not match f(0) = 36 for the function given in the problem statement.
The only true answer choices are B and E.
_____
The remainder theorem tells you that f(a) = the remainder from f(x)/(x -a).
7x+14=7(x+2)
[tex]7x + 14 = 7(x + 2)[/tex]
Answer:
The equation has infinitely many solutionsx ∈ REach real number is the solution of this equation.Step-by-step explanation:
[tex]7x+14=7(x+2)\qquad\text{use the distributive property}\ a(b+c)=ab+ac\\\\7x+14=(7)(x)+(7)(2)\\\\7x+14=7x+14\qquad\text{subtract}\ 7x\ \text{from both sides}\\\\7x-7x+14=7x-7x+14\\\\14=14\qquad\bold{TRUE}\\\\\bold{CONCLUSION}\\\text{The equation has infinitely many solutions}[/tex]
Given the two linear equations 4r - 5 = 17 and 12 - 2s = 2, what is the product of r and s?
[tex]\text{You're solving the equations:}\\\\4r - 5 = 17\\ 12 - 2s = 2\\\\\text{Solve for r:}\\\\4r-5=17\\\\\text{add 5 to both sides}\\\\4r=22\\\\\text{Divide both sides by 4}\\\\\boxed{r=5.5}\\\\\text{Solve for s:}\\\\12 - 2s = 2\\\\\text{Subtract 12 from both sides}\\\\-2s=-10\\\\\text{Divide both sides by -2}\\\\[/tex]
[tex]\boxed{s=5}[/tex]
An equation is formed when two equal expressions. The product of r and s is 27.5.
What is an equation?An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The given equation 4r - 5 = 17 can be solved for r as shown below,
4r - 5 = 17
Add 5 on both the sides of the equation,
4r - 5 + 5 = 17 + 5
4r = 22
Divide both the sides of the equation by 4,
4r / 4 = 22 / 4
r = 11/2
r = 5.5
The given equation 12 - 2s = 2 can be solved for s as shown below,
12 - 2s = 2
Subtract 12 from both the sides of the equation,
12 - 2s - 12 = 2 - 12
-2s = -10
Divide both the sides of the equation by -2,
-2s/-2 = -10/-2
s = 5
Now, the product of r and s can be written as,
r × s
= 5.5 × 5
= 27.5
Hence, the product of r and s is 27.5.
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PLEASE HELP ASAP!!!!!! 30 POINTS!!!!
I JUST NEED SOMEONE TO HELP ME WITH THE TOP ONE!!! PLEASE!!!!!
Graph the following lines given the equation or y-intercept with an ordered pair, with a y-intercept of 3 and an ordered pair of (3, 4).
Line 1: y-intercept: 3 ordered pair: (3, 4)
Line 2: y=-2x+2
Answer:
Part 1) The graph in the attached figure N 1
Part 2) The graph in the attached figure N 2
Step-by-step explanation:
Part 1) we have
Line 1: y-intercept: 3 ordered pair: (3, 4)
we know that
To draw a line we need a minimum of two points
Remember that the y-intercept is the value of y when the value of x is equal to zero
so
In this problem we have
(0,3) and (3,4)
Plot the points on a coordinate plane and connect them to graph the line
see the attached figure N 1
Part 2) we have
Line 2: y=-2x+2
Find the intercepts of the line
Find the y-intercept (value of y when the value of x is equal to zero)
For x=0
[tex]y=-2(0)+2=2[/tex]
The y-intercept is the point (0,2)
Find the x-intercept (value of x when the value of y is equal to zero)
For y=0
[tex]0=-2x+2\\2x=2\\x=1[/tex]
The x-intercept is the point (1,0)
Plot the intercepts and connect them to graph the line
see the attached figure N 2
Answer:
Part 1) The graph in the attached figure N 1
Part 2) The graph in the attached figure N 2
Step-by-step explanation:
Part 1) we have
Line 1: y-intercept: 3 ordered pair: (3, 4)
we know that
To draw a line we need a minimum of two points
Remember that the y-intercept is the value of y when the value of x is equal to zero
so
In this problem we have
(0,3) and (3,4)
Plot the points on a coordinate plane and connect them to graph the line
see the attached figure N 1
Part 2) we have
Line 2: y=-2x+2
Find the intercepts of the line
Find the y-intercept (value of y when the value of x is equal to zero)
For x=0
The y-intercept is the point (0,2)
Find the x-intercept (value of x when the value of y is equal to zero)
For y=0
The x-intercept is the point (1,0)
Plot the intercepts and connect them to graph the line
see the attached figure N 2
How many points need to be removed from this graph so
that it will be a function?
1 point
2 points
3points
4 points
Answer:
OPtion 3 points
Step-by-step explanation:
See the attached figure.
As shown, we can notice that the coordinates of all the points are (-3,2), (-3,3), (1,4), (1,-4), (2,-2), (2,-4).
The figure will be a function if for each value of x there exist a unique value of y.
In the figure, for each value of x we have two values of y. So it is not a function. We need to remove any of ordered pairs that have same input values.
From (-3,2) and (-3,3), we need to remove one point.
From (1,4) and (1,-4), we need to remove one point.
From (2,-2) and (2,-4), we need to remove one point.
It means total we need to remove 3 points from this graph so that it will be a function.
So, the correct option is 3 points.
20x^2+8x divided by 2
Answer:
[tex]10 {x}^{2} + 4x[/tex]
Step-by-step explanation:
[tex] \frac{20 {x}^{2} + 8x }{2} = \frac{20x}{2} + \frac{8x}{2} = 10 {x }^{2} + 4x[/tex]
42% of what number is 0.21?
Answer: 0.5
Step-by-step explanation:
Let the number be x , then
42% of x = 0.21
0.42x = 0.21
divide through by 0.42
x = 0.21/0.42
x = 0.5
Therefore : 42% of 0.5 = 0.21
Answer:
.5
Step-by-step explanation:
.42/1 * x = .21
x = .21/.42
x = .5 or 1/2
What is the radius of my circle if it has a circumference of 154 cm give your answer to the nearest whole number
Answer: r ~= 24.50986
Step-by-step explanation:
This question is done by simply looking at the circumference formula for a circle (2pi r)
154= 2*pi*r
154/(2*pi) = r
r ~= 24.50986
Answer:
Step-by-step explanation:
[tex]circumference=2\pi*r\\\\2\pi*r=154\\\\2*\frac{22}{7}*r=154\\\\r=\frac{154*7}{2*22}\\\\r=\frac{49}{2}=24.5 cm[/tex]