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pav-90 [236]
3 years ago
7

Write the following phrase as an algebraic expression. Use n for “a number.” the product of two and the sum of a number and eigh

t
a. 2(n -8)
b.n+8/2
c. 2n + 8
d. 2(n + 8)
Mathematics
2 answers:
Lemur [1.5K]3 years ago
8 0
We are to write the expression for:

<span>The product of two and The sum of a number and eight 
</span>
This means 2 is to be multiplied with the sum of 8 and the number. The number is n. So sum of 8 and number is 8 + n

Product of 2 and the sum is 2 (8 + n)

Therefore, the correct answer is option D
Y_Kistochka [10]3 years ago
4 0

the correct answer is D

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Chapman’s brickyard sells bricks and blocks. A brick costs $0.38 and a block costs $1.56. The brickyard filled a $24.80 order, w
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Answer:

number of bricks = 16 and number of blocks  = 12

Step-by-step explanation:

From given information it seems , we need to determine number of bricks and number of blocks.

lets assume number of bricks = x

and number of blocks = y

since total items in brickyard is 28

⇒  number of bricks + number of blocks = 28

⇒ x + y = 28         ----------------------- equation 1

Given that cost of 1 brick = $0.38  and cost of 1 block =$1.56

so cost of x bricks = cost of 1 brick × x = 0.38x

And cost of y blocks = cost of 1 block × y = 1.56y

total cost of 28 items order = $24.80

total cost of 28 items = cost of x bricks + cost of y blocks

⇒0.38x + 1.56y = 24.80 ----------------equation 2

Now we are having following two equations

x + y = 28         ----------------------- equation 1

0.38x + 1.56y = 24.80 ----------------equation 2

from equation 1 we get x = 28 - y , substituting this value of x in equation 2 we get

0.38(28 - y) + 1.56y =  24.80

⇒10.64-0.38y+1.56y= 24.80

⇒1.18y = 24.80 - 10.64

⇒y = 14.16÷1.18 = 12

substituting value of y in equation 1 we get

x + 12 = 28

⇒x = 16

hence  number of bricks = x  = 16 and number of blocks = y = 12



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3 years ago
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