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3 years ago

Used DVDs are on sale for a price of 5 for $20. At that price, how much will is cost to buy 12 used DVDs?

Mathematics

2 answers:

Levart [38]3 years ago

6 0

If you reduce the 5 for 20, you will get 1 for $4. Therefore, 12×4 will be the answer ($48)

siniylev [52]3 years ago

5 0

Hey there!

We know that 5 are $20, if we have the same rate then:

$20/5= 4

Each movie costs $4.

$4 * 12= $48

12 movies will cost $48 dollars.

I hope this helps!

~kaikers

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3 years ago

Simplify: -1-(-10x-10)

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Answer:

10x + 9

Step-by-step explanation:

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3 years ago

The length and width of a rectangle are 7 cm and (x-8) cm respectively. Find the value of x if the area with of the rectangle is

Tcecarenko [31]

to find the area of a rectangle is LxW=A

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3 0

3 years ago

Solve the system: 2x+6y=36 x+4y=20

Assoli18 [71]

Let's solve this problem step-by-step

Let's set:

2x + 6y = 36 -- equation 1

x + 4y = 20 -- equation 2

(equation 2) * 2

2x + 8y = 40 -- equation 3

(equation 3) - (equation 1)

2y = 4

y = 2 -- equation 4

Plug (equation 4)'s value of y into (equation 2)

x + 4(2) = 20

x = 20 - 8

x = 12

Thus x = 12 and y = 2

Let's check, by substituting these values

$2x + 6y = 36\\2(12)+6(2) = 36\\24+12=36\\36=36\\\\x+4y=20\\12+4(2)=20\\12+8=20\\20=20$

Answer: x = 12 and y = 2

Hope that helps!

5 0

2 years ago

Tina had $47.10 in her bank account on Monday. She withdrew $25 on Monday and also made a deposit of an amount d that she cannot

nalin [4]

The correct answer is a. 47.10 - 25 + d = 97.43.

This is because you have to subtract the $25, because it is a withdrawal, or taking out of money.
This rules out options C and D.

Also, Tina made a deposit of an amount that she can't remember. A deposit is adding a certain amount of money, so you have to +d.

This rules out option B.

The only option left is option A, which makes complete sense.

4 0

3 years ago