In the expression 4 (2m-n), determine which of the following best describes the role of (2m-n).

Mathematics

1 answer:

Dmitrij [34]3 years ago

4 0

Answer:

Step-by-step explanation:

(2m-n) is a factor of 4(2m-n)

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Find volume of this prism

attashe74 [19]

Answer:

324 km²

Step-by-step explanation:

The prism shown is a square pyramid

The volume of a square pyramid can be calculated by using this formula

$V=lw\frac{h}{3}$

where l = length of base, w = width of base and h = height

We are given the following dimensions...

length of base = 9 km

width of base = 9 km

height = 12 km

To find the volume of the pyramid, we plug in these given values into the formula

Hence,

$V = 9 * 9* \frac{12}{3} \\\frac{12}{3} =4\\V = 9*9*4\\9*9=81\\81*4=324\\$

V = 324

6 0

2 years ago

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Simplify 2x^2+6x-7x+8-3x^2+1

Doss [256]

$(((((2*(x^2))+6x)-7x)+8)-3x^2)+1 \\ \\ ((((2x^2 + 6x) - 7x) + 8) - 3x^2) + 1 \\ \\ we \ would \ then \ (pull \ out) \ like \ terms. \\ \\ -x^2 - x + 9 = -1 * (x^2 + x - 9) \\ \\ \left[\begin{array}{ccc} -9 + 1 = -8 \\
 -3 + 3 = 0 \\
 -1 + 9 = 8 \\
\end{array}\right] \\ \\ Your \ answer: \boxed{\boxed{\bf{ -x^2 - x + 9
}}}$

I hope this helps you!

3 0

3 years ago

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Ralph is an electrician. He charges an initial fee of $26, plus $31 per hour. If Ralph earned $119 on a job, how long did the jo

lubasha [3.4K]

3 hours

You can turn this into an equation:

F = 26 + 31t
Where F is the money Ralph earned, and t is the number of hours he worked.

Plugging in the 119 for F, we get
119 = 26 + 31t

93 = 31t

3 = t

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