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3 years ago

The area of a rectangle is 42 milimeter .The length is 7 milimeters. What is the perimter of rectangel?

Mathematics

2 answers:

Leni [432]3 years ago

8 0

Answer:

6 millimeters

Step-by-step explanation:

A = L × W

A ÷ L = W

42 ÷ 7 = 6

Harman [31]3 years ago

7 0

Step-by-step explanation:

Perimeter of rectangle

$= 2(7 + \frac{42}{7} ) \\ \\ = 2(7 + 6) \\ \\ = 2 \times 13 \\ \\ = 26 \: mm$

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3 years ago

If (-1, y) lies on the graph of y=2^2x then y=

zubka84 [21]

Answer:

y is 1/4 when x is -1 if I did interpret your equation right. Please see that I did.

I believe the equation to be $y=2^{2x}$ . If you meant $y=2^2x$ , please let me know.

Thanks kindly.

Step-by-step explanation:

If (-1,y) lies on the graph of $y=2^{2x}$ , then by substitution we have:

$y=2^{2\cdot -1}$ .

We just need to simplify to determine y:

$y=2^{2 \cdot -1}$

Multiply the 2 and -1:

$y=2^{-2}$

Use reciprocal rule for exponents to get rid of the negative:

$y=\frac{1}{2^2}$

$2^2$ just means $2(2)$ :

$y=\frac{1}{2(2)}$

$y=\frac{1}{4}$ .

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3 years ago