PLEASE HELP MEEEE

Mathematics

1 answer:

gladu [14]3 years ago

5 0

Answer: About 1 yard is a reasonable estimate.

Step-by-step explanation:

1 ⁷/₁₄ is a yard and a half

⁹/₁₄ is just a bit more than half a yard

Rounding that off to half a yard, and finding the difference leaves about 1 yard.

The actual difference is ¹²/₁₄ of a yard the same as ⁶/₇ of a yard, or just about 5¹/₂ inches less than a yard.

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Can u guys please help me?

Eduardwww [97]

Answer:

Step-by-step explanation:

The surface area of a cube is given by

SA = 6s^2 where s is the side length

We know the surface area is 486 and the side length is z

486 = 6z^2

Divide each side by 6

486/6 = 6z^2/6

81 = z^2

Take the square root of each side

sqrt(81) = sqrt(z^2)

9 = z

Each side has a length of 9m

5 0

4 years ago

3(-4n - 9) = 21 plc solve

erma4kov [3.2K]

<h3>Answer:</h3>

$\huge{\boxed{n=-4}}$

<h3>Explanation:</h3>

$\begin{array}{cc}\begin{flushright}\text{Divide both sides of the equation by 3.}\end{flushright}&\begin{flushleft}-4n-9=7\end{flushleft}\\\begin{flushright}\text{Add 9 on both sides.}\end{flushright}&\begin{flushleft}-4n=16\end{flushleft}\\\begin{flushright}\text{Divide both sides by -4.}\end{flushrigh}&n=-4\end{array}$