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2 years ago

Evaluate the expression. (-3)^-2

Mathematics

2 answers:

Romashka [77]2 years ago

8 0

Answer:

I love daddies

Step-by-step explanation:

i love daddies

Wewaii [24]2 years ago

3 0

$~~(-3)^{-2}\\\\\\=\dfrac 1{(-3)^2}~~~~~~~~~~~~~~~~~~~~~~~~~;\left[k^{-n} = \dfrac 1{k^n},~~~ k \neq 0\right]\\\\\\=\dfrac 1{(-1)^2 \cdot 3^2}\\\\\\=\dfrac 1{1 \times 9}\\\\\\=\dfrac 19$

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The answer is 75! Explanation, use the distance formula

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3 years ago

Read 2 more answers

The area of a rectangular concrete patio is 70 square meters. the perimeter is 34 meters. what are the dimensions of the patio?

Finger [1]

A = L * W
A = 70

70 = L * W

P = 2(L + W)
P = 34

34 = 2(L + W)
34/2 = L + W
17 = L + W
17 - W = L

70 = L * W
L = 17 - W

70 = W(17 - W)
70 = -W^2 + 17W
W^2 - 17W + 70 = 0
(W - 10)(W - 7) = 0

W - 10 = 0 L = 17 - 10
W = 10 L = 7

W - 7 = 0 L = 17 - 7
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so either the width is 10 meters and the length is 7 meters OR the width is 7 meters and the length is 10 meters

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3 years ago

Simplify the expression<br> -2(5z -7)

zaharov [31]

-10z+14 would be the simplified answer

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3 years ago

Economists predict that Americans will spend $1,180 on Summer Vacation in 2015, this is up 4.8% from 2014. What did Americans sp

natta225 [31]

Answer:

$1151.4

Step-by-step explanation:

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3 years ago

Principal Lopez asked her 500 students to vote on the school's annual gift. 300 students voted to donate a telescope for the sci

Maksim231197 [3]

Using the percentage concept, it is found that 60% of the students voted to donate a telescope.

<h3>What is a percentage?</h3>

The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:

$P = \frac{a}{b} \times 100\%$

In this problem:

The total amount is the number of students, which is of b = 500.

300 voted to donate, hence a = 300.

The <em>percentage </em>is given by:

$P = \frac{300}{500} \times 100\% = 60\%$

60% of the students voted to donate a telescope.

More can be learned about the percentage concept at brainly.com/question/10491646

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2 years ago