3 years ago

Select The Equivalent Expression

Mathematics

1 answer:

vladimir1956 [14]3 years ago

6 0

The answer should be B

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The sum of half of a number and 8 less<br> than the number is 25. Find the number.

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Answer:

The number is 22

Step-by-step explanation:

let x = the number

$\frac{1}{2} x + x - 8 = 25 \\ \frac{1}{2} x + x - 8 + 8 = 25 + 8 \\ \frac{1}{2} x + x = 33 \\ factor \: out\: x \: on \: the \: left \\ x( \frac{1}{2} + 1) = 33 \\ divide \: both \: sides \: by \: \frac{1}{2} + 1 \\ \frac{x( \frac{1}{2} + 1) }{ \frac{1}{2} + 1} = \frac{33}{ \frac{1}{2} + 1} \\ x = \frac{33}{ \frac{3}{2} } \\ x = \frac{66}{3} \\ x = 22$

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What are the factors of x^2 + 8x + 12?

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Answer:

(x+2)(x+6)

Step-by-step explanation:

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In a school, the ratio of boys to girls is 4:3. There are 216 boys. How many girls are there?

tankabanditka [31]

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