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enyata [817]
3 years ago
9

David bought 3 dvds for for books for $40 at a yard sale in about one dvd and six books for $18 how much did each dvd cost

Mathematics
1 answer:
pentagon [3]3 years ago
5 0
The system:
3 x + 4 y = 40
x + 6 y = 18,
-------------------
x = 18 - 6 y
3 ( 18 - 6 y ) + 4 y = 40
54 - 18 y + 4 y = 40
54 - 40 = 18 y - 4 y
14 = 14 y
y = $1
x = 18 - 6
x = $12
Answer: Each DVD costs: $12.
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Tanya [424]

Answer:

B. 60cm^3

Step-by-step explanation:

The volume of a right triangular prism is

V = BH  where B is the area of the triangle and H is height

B = 1/2 bh  where b =5 and h =8

B = 1/2 *40 = 20

V = (20) * 3

V = 60 cm^3

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8 0
4 years ago
1. A rectangular room measures 12 feet by 16 feet. It is going to be carpeted with carpet that
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Answer:

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Step-by-step explanation:

7 0
3 years ago
In 2002, there were 972 students enrolled at Oakview High School. Since then, the number of students has increased by 1.5% each
Katarina [22]

Answer:

The number of student increased each year by 986.58.

Step-by-step explanation:

Given : In 2002, there were 972 students enrolled at Oakview High School.

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Solution :

Using the exponential growth function,

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Here, P_o=972 is the initial population

r=1.5%=0.015 is the rate

t=1 time

P(t)=972(1+0.015)^1

P(t)=972(1.015)

P(t)=986.58

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4 years ago
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4 years ago
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