When Jeremy made 8 black and white copies and 2 color copies at a copy shop, the cost was $1.20. When he made 10 black and white copies and 10 color copies, the cost was $3.00. How much do black and white copies cost?

Answers

Answer 1

Answer:

10¢

Step-by-step explanation:

First, to be able to differentiate between the B&W and Color copies, use x in place of the B&W copies and y in place of the Color copies.

Then, write a system of equations to solve (the system of equations input was not working, so there is no brace):

8x + 2y = $1.20

10x + 10y = $3.00

Then, solve the system of equations:

8x + 2y = $1.20

10x + 10y = $3.00

Isolate x to be able to substitute:

8x + 2y = $1.20

8x = -2y + 1.2

x = -2/8y + 1.2/8

x = -0.25y + 0.15

Substitute:

10x + 10y = $3.00

10 (-0.25y + 0.15) + 10y = 3

-2.5y + 1.5 + 10y = 3

7.5y + 1.5 = 3

7.5y = 1.5

y = $0.20

Now that you have the cost of the Colored copies, you can plug it in to find the B&W copies:

8x + 2y = $1.20

8x + 2(0.2) = 1.2

8x + 0.4 = 1.2

8x = 0.8

x = $0.10

Related Questions

Given the circumference of a circle formula, solve for r

Please answer!

Answers

Answer:

Step-by-step explanation:

divide both sides by 2pi

Which word best describes Dr. Reefy

Answers

1. It is confuse that is the best answer

11y = 2y + 45 solve for y.

Answers

Answer:

[tex]y=5[/tex]

Step-by-step explanation:

[tex]11y=2y+45[/tex]

Start by subtracting [tex]2y[/tex] from both sides of the equation:

[tex]9y=45[/tex]

Divide by the coefficient of [tex]y[/tex], which is [tex]9[/tex]:

[tex]y=5[/tex]

Check your work by substituting the solved [tex]y[/tex] value ([tex]5[/tex]):

[tex]11(5)=2(5)+45[/tex]

[tex]55=10+45[/tex]

[tex]55=55[/tex]

Since both sides of the equation are equal, our answer is correct!

Answer:

y = 5

Step-by-step explanation:

Solving the equation for y means finding the value of that variable that makes the equality true.

11y = 2y + 45

Subtract 2y from both sides.

11y - 2y = 45

9y = 45

Divide both sides by 9.

y = 5

Jumping makes a frog so tired, each successive jump is 2/3 the distance of the previous hump. If a frog jumps 24 cm on its first jump, how far will the frog travel after four jumps?

Answers

7 cm, after 4 jumps the frog 7.111... cm.

At the hardware store you can buy 9 boxes of bolts for $18.81. This can be expressed by the equation 18.81=(2.09)9.

How much would it cost for 2 boxes?

Group of answer choices

$18.00

$4.18

$2.09

$9.00

Answers

18.81 divide by 9 multiply by 2 it will be $4.18

18.00 so you can divide it

What's Ta
Try solving the following problem
In a group of 120 students, 68 had ridden a bus, 78 had ridden the LRT. 33
had ridden a jeep, while 40 had ridden both the bus and the LRT, 20 had ridden
the bus and the jeep, 19 had ridden the LRT and the jeep and 15 had ridden the
bus, the LRT and the jeep.
a. How many had ridden the bus only?
b. How many had ridden the LRT only?
c. How many had ridden the jeep only?
d. How many did not ride on any of the three modes of transportation?

Answers

Answer:

A.) bus only = 23

B.) LRT only = 34

C.) Jeep only = 9

D.) 5

Step-by-step explanation:

Let :

B = bus ; J = Jeep ; L = LRT

KINDLY CHECK ATTACHED PICTURE FOR DETAILED EXPLANATION

A set is a group of related item.

34 had ridden on LRT only23 had ridden on bus only9 had ridden on jeep only5 did not ride on any

Let:

[tex]Total =120[/tex]

[tex]B = 68 \to Bus[/tex]

[tex]L = 78 \to LRT[/tex]

[tex]J =33 \to Jeep[/tex]

[tex]n(B\ n\ L) = 40[/tex]

[tex]n(B\ n\ J) = 20[/tex]

[tex]n(L\ n\ J) = 19[/tex]

[tex]All = 15[/tex]

(a) Bus only

This is calculated using:

[tex]B\ only = B - n(B\ n\ L) - n(B\ n\ J) + All[/tex]

So, we have:

[tex]B\ only = 68 - 40 - 20 + 15[/tex]

[tex]B\ only = 23[/tex]

(b) LRT only

This is calculated using:

[tex]L\ only = L - n(B\ n\ L) - n(L\ n\ J) + All[/tex]

So,

[tex]L\ only = 78 - 40 - 19 + 15[/tex]

[tex]L\ only = 34[/tex]

This is calculated using:

[tex]J\ only = J - n(B\ n\ J) - n(L\ n\ J) + All[/tex]

So, we have:

[tex]J\ only = 33 - 20 - 19 + 15[/tex]

[tex]J\ only = 9[/tex]

(d) None

Let x represents those that took none of the means of transport.

So, we have:

[tex]Total = B\ only + J\ only + L\ only + [n(B\ n\ L) -All] +[n(B\ n\ J) -All] +[n(L\ n\ J) -All] + All + x[/tex]

This gives

[tex]120= 34 + 23 + 9 + [40 -15] +[20 -15] +[19 -15] + 15 + x[/tex]

[tex]120= 115 + x[/tex]

Collect like terms

[tex]x = 120 - 115[/tex]

[tex]x = 5[/tex]

See attachment for the Venn diagram of the set.

Answers

Answer:

A. 217

Step-by-step explanation:

3,472/16 = 217

a is the answer hope this helped a lot man have a good day

PLEASE HELP ASAP

Prove that triangles PQR and RSQ are congruent.
Given:
PQ = RS, and

Answers

Answer:

Step-by-step explanation:

ok so lets assume that line PQ and RS and QR and PS are parallel lines cut by a transeversal. To prove this you can do it in a couple of different ways the one way i know is that if you assume these are parralel then you can uses the alternate interior anges to prove that measure of QSP and SQR then by logic you know that PQS + SQR = RSQ+QSP which symplifies to PQR = RSQ

PLEASE HELP!!!!! How do you turn 0.480 into a fraction???? PLEASE SHOW WORK IF YOU CAN?

Answers

Answer:

the answer is 48/100 im pretty sure .

Step-by-step explanation:

Answer:

12/25

Step-by-step explanation:

first you take your decimal and because it is a decmial the decimal is in a fraction, 48/100 don't pay attention to any 0's behind any other number.

once you have 48/100 divide the numerator(the top of the fraction) and the denominator(the bottom of the fraction) and divide it by 4

I think of two numbers.
When I add the numbers, the answer is 8.
When I subtract the numbers, the answer
Is less than 6.
What can the numbers be?
The two numbers can be _ and _ .

Answers

Answer:

There are a variety of possible answers, including the following:

4 and 4 (4 + 4 = 8........4 - 4 = 0.......... 6 > 0)

6 and 2 (6 + 2 = 8........6 - 2 = 4.......... 6 > 4)

5 and 3 (5 + 3 = 8.........5 - 3 = 2.......... 6 > 2)

And for the subtraction, each can be reversed (2 - 6 ...... 3 -5 ...... etc.)

Answer:

2 and 3 is the answer we know it right

pls help will give brainliest

Answers

Answer:3rd one

Step-by-step explanation:

2. The snow at Afton Alps is 3 meters deep when it starts snowing. After 3 hours the snow is 3.6 meters deep. What
is the rate of change of snowfall in meters per hour?

Answers

I think 0.2 because start it’s already3 mean 3.6-3=0.6 3hours=0.6/3=0.2

sams cola 0-0 T-T :-(

What is the ratio of the two quantities? Warning: different units! a 4 seconds to 2 min

Answers

Answer:

17:420

Step-by-step explanation:

17 seconds : 7 minutes

7 minutes = 420 seconds

17:420

The ratio of time measurements in two different units is 1/30.

What is Ratio?

Ratio is the quantitative relation between two amounts showing the number of times one value contains or is contained within the other.

Given are the time measurements in two different units.

Converting 2 minutes into seconds -

2 min = 2 x 60 = 120 seconds

Now, 4 seconds to 120 seconds can be written as fraction below -

x/y = 4/120 = 1/30

Then, the ratio will be -

x : y = 1 : 30

Therefore, the ratio of time measurements in two different units is 1:30

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Which relationships have the same constant of proportionality between Y and as the equation Y=5/2 X

Answers

Answer:

I'm pretty sure it's 10/4 but I'm not totally sure

Answer:

on Khan the answer is B,C,E

Carlos was baking 1,000 cookies for a yard sale. 3 people bought 82 cookies each. How many cookies does Carlos have left? Explain.

Answers

Answer: 754

Step 1: Multiply 82 x 3.

82 x 3 = 246.

Step 2: Subtract 246, because he sold this much cookies.

1,000 - 246 = 754

Answer = 754.

Hope this helps you!

Answer:

First we need to multiply 3x82. 3x82=246 now we need to subtract 246 from 1,000. 1,000-246=754

Step-by-step explanation:

Caleb and Sergio stacked boxes on a shelf. Caleb lifted 14 boxes and Sergio lifted 12 boxes. The boxes that Sergio lifted each weighed 10 lb more than the boxes Caleb lifted.

Let c represent the weight of each box Caleb lifted.

Which expression represents the total number of pounds Sergio lifted?

120c

10(c−12)

12(c+10)

c + 10

Answers

Answer:

Step-by-step explanation:

Answer:

12 c+10

Step-by-step explanation:

becus

6 apples cost exactly the same as 9 oranges. 10 apples and 10 oranges cost $7.50. Find the cost of 1 apple and the cost of 1 orange.

Answers

Answer:6 apples cost exactly the same as 9 oranges. 10 apples and 10 oranges cost $7.50. Find the cost of 1 apple and the cost of 1 orange.

Step-by-step explanation:

Please help

An isosceles triangle is shown. Which two angles must be congruent?

Answers

Answer:

C. Angle I and Angle H

Step-by-step explanation:

The congruncy lines on either side of the triangle show that.

An isosceles triangle has two congruent angles.

The two angles that must be congruent are: [tex]\mathbf{\angle I \cong \angle H}[/tex]

From the figure, we observe that side lengths HJ and HI are congruent.

The above highlight means that: the angles at the other points of HJ and HI.

The common point of HJ and HI is H, while the other points are J and I

So, the angles at J and I are congruent.

Hence, the correct option is (c)

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Solve A=4πr² for π. What is the solution to this problem?

Answers

Answer:

A/4r²=π

Step-by-step explanation:

A=4πr²

Divide each side by 4r²

A/4r²=4πr² /4r²

A/4r²=π

what is the least common factor of 25 and 8

Answers

Answer:

1 hope this helps

Step-by-step explanation:

The scale of a map says that 3 cm represents 8 km.

1. What distance on the map (in centimeters) represents an actual distance of 20
kilometers?

2. What is the actual number of kilometers that is represented by 12 centimeters on the map?

(Just type the number in your answer.)

Answers

Step-by-step explanation:

mark above answer BRILLIANT

Points that do not lie in the same plane are called________points

Answers

Answer:

non - collinear points

Step-by-step explanation:

points that dont lie on the same line

A packet of crisps contains 1.2 g of salt .Lucy eats 0.7 of the packet of crisps.How much salt does she eat

Answers

Answer:

1.9

Step-by-step explanation:

1.9 is the answer because if you add 1.2+0.7=1.9

After 2 weeks of training Amanda learned a total of 5 appetizer recipes after 6 weeks of training how much appetizers will she learn

Answers

Answer:

Step-by-step explanation:

After 6 weeks of training, Amanda will learn 15 recipes.

What is ratio?

Ratio basically compares quantities, that means it shows the value of one quantity with respect to the other quantity.

If a and b are two values, their ratio will be a:b,

Given that,

Recipes learned by Amanda after 2 weeks of training = 5.

After 6 weeks of training, the number of recipes are required.

To find the number of recipes,

Use ratio property,

After 2 weeks of training = 5 recipes

After 1 week of training = 5/2 recipes.

Therefore, after 6 weeks of training = (5/2) x 6 = 15 recipes.

Amanda will learn 15 recipes after 6 weeks of training.

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Graph the line that passes through the points (-5,2) and (6,2) and determine the equation of the line.

Answers

Answer:

y = 2

Step-by-step explanation:

....................

Isabella and Madeline share a bag of cherries. if isabella eats 25% of the cherries and there are 76 cherries in the bag, how many cherries did isabella eat?

Answers

Answer:

Step-by-step explanation:

Which net represents this triangular prism?

Answers

Hanap ka nalang sa google vhie d ko den alam eh

Answer:

If you talking about iready. It's the first pink one.

Step-by-step explanation:

Find the number that makes the ratio equivalent to 7:8.
:24

Answers

Answer:

21:24

Step-by-step explanation:

7:8 is your ratio

so if _:24 is equivalent, you have to figure out what 24 is divisible by to equal 8

8×3=24

so now we have to multiply 7 by 3

7×3=21

so your answer is 21:24 = 7:8

hope this helps :)

someone help please!!

Answers

Answer:

Step-by-step explanation:

I’m not sure but I think it’s 1

Question 2 A man ran 20 miles in 2 hours. Calculate the average time that it took the man to run each mile in minutes.

Answers

Answer:

6 mintutes per mile

Step-by-step explanation:

find how many minutes are in 2 hours which is 120 then divide that by 20 to get a total of 6

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When Jeremy made 8 black and white copies and 2 color copies at a copy shop, the cost was $1.20. When he made 10 black and white copies and 10 color copies, the cost was $3.00. How much do black and white copies cost? ​

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When Jeremy made 8 black and white copies and 2 color copies at a copy shop, the cost was $1.20. When he made 10 black and white copies and 10 color copies, the cost was $3.00. How much do black and white copies cost?