3 years ago

Factor completely 5x(x+3)+6(x+3)

Mathematics

1 answer:

mars1129 [50]3 years ago

4 0

Answer:

5x2 + 21x + 18

Step-by-step explanation:

5x2 + 15x + 6x + 18 = 5x2 + 21x + 18

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Whats the square footage of 10 by 10

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3 years ago

Solve x-15=8 Help! Thank you!

Bezzdna [24]

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The perimeter of a rectangular metal plate is 15 cm. Find the length of the rectangular plate (in decimals) whose width is 228 c

scoray [572]

The Solution.

Representing the problem in a diagram, we have

By formula,

$P=2(L+W)$

In this case,

$P=15\operatorname{cm},L=?,W=\frac{22}{8}cm$

Substituting these values in the formula above, we get

$15=2(L+\frac{22}{8})$

Clearing the bracket, we get

$15=2L+(2\times\frac{22}{8})$ $\begin{gathered} 15=2L+\frac{11}{2} \\ \\ 15=2L+5.5 \end{gathered}$ $\begin{gathered} 15-5.5=2L \\ 9.5=2L \end{gathered}$

Dividing both sides by 2, we get