The length of a rectangle is 8 inches and the width is x inches. What is the perimeter, in inches?

Mathematics

1 answer:

Nuetrik [128]2 years ago

4 0

It is A! 8 x 2=16
And the other side is 2

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Find the inverse of the function x2 + y2 = 4 and the domain of the inverse for 0 ≤ x ≤ 2.

alexandr402 [8]

To get the inverse "relation" of an expression, we first off, do a quick switcharoo of the variables, and then solve for "y", so let's proceed,

$\bf x^2+y^2=4\qquad inverse\implies \boxed{y}^2+\boxed{x}^2=4
\\\\\\
y^2=4-x^2\implies y=\pm\sqrt{4-x^2}$

and yes, the domain for the range 0 ⩽ x <span>⩽ 2, let's get instead the "range" of the original function,

</span> $\bf x^2+y^2=4\implies 0^2+y^2=4\implies y=\pm\sqrt{4}\implies \boxed{y=\pm 2}
\\\\\\
x^2+y^2=4\implies 2^2+y^2=4\implies 4+y^2=4\implies \boxed{y=0}\\\\
-------------------------------\\\\
\stackrel{\textit{range of original}}{-2\le y \le 2}~~=~~\stackrel{\textit{domain of its inverse}}{-2\le x \le 2}$ <span>
</span>

8 0

3 years ago

-4 = 8m please show step by step

GREYUIT [131]

so you do 8÷-4=2. so m equals 2

5 0

3 years ago

Read 2 more answers

Y varies directly with x. When x is 4 y is 8. Find y when x = 10.

grandymaker [24]

Step-by-step explanation:

y = 4 when x = 8 So, 4 = 8k

k = 1/2

y = (1/2)x

Therefore, when x = 10, y = (1/2)(10) = 5

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natta225 [31]

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A and E are the answers

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vovangra [49]

The correct answer is Choice B: 720.

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For the first one, there are 10 options, then 9 options and finally 8 options.

10 x 9 x 8 = 720

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3 years ago