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8 months ago

8(x+2) Evaluate when x=3

Mathematics

1 answer:

Burka [1]8 months ago

6 0

When the value of x is 3, evaluate;

$8(x+2)$

Substitute for the value of x into the parenthesis;

$\begin{gathered} 8(x+2)=8(3+2) \\ 8(x+2)=8(5) \\ 8(x+2)=40 \end{gathered}$

ANSWER:

The expression equals 40 (when x = 3)

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Black_prince [1.1K]

Answer:

$\frac{19}{12}\ pounds$

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Step-by-step explanation:

The correct question is

A landscaper needs 3 4/8 pounds of plant food. He has 1 1/4 pounds in his truck, and another 4/6 pound at his shop. How many more pounds of plant food does the landscaper need?

Let

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we know that

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The linear equation that represent this problem is

$x+1\frac{1}{4}+\frac{4}{6}=3\frac{4}{8}$

Convert mixed number to an improper fractions

$1\frac{1}{4}=1+\frac{1}{4}=\frac{4*1+1}{4}=\frac{5}{4}$

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Substitute in the expression above

$x+\frac{5}{4}+\frac{4}{6}=\frac{14}{4}$

solve for x

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$24x+30+16=84$

Combine like terms left side

$24x+46=84$

subtract 46 both sides

$24x=84-46$

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Divide by 24 both sides

$x=\frac{38}{24}\ pounds$

simplify

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Convert to mixed number

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Answer:

Step-by-step explanation:

Given

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