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RideAnS [48]
3 years ago
6

What is -9 to the second power

Mathematics
2 answers:
OLEGan [10]3 years ago
4 0
-9 to the second power will most likely be 81. A negative x a negative equals a positive. Hope this helped.
Kamila [148]3 years ago
3 0

Answer:

-9^{2} = 81

Explanation:

Since you have to square -9 twice, you get 81 because -9*-9=81.

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What are the solutions to the equation x2 - 8x = 10
mojhsa [17]

Answer:

x = 4 ±√26

Step-by-step explanation:

Please write this as x^2 - 8x = 10, or x^2 - 8x - 10 = 0.  " ^ " indicates exponentiation.

Let's complete the square:

x^2 - 8 x can be rewritten as

x^2 - 8x + 16 - 16, and so

x^2 - 8x = 10 becomes x^2 - 8x + 16 - 16 - 10 = 0, or

                                         (x - 4)^2 = 26

Taking the square root of both sides, we get:

x - 4 = ±√26, or

x = 4 ±√26

5 0
3 years ago
How many periods of time, each 1/3 of an hour long, does,a 8- hour period of time represent
Sloan [31]

1/3 of an hour = 20 minutes

8 hours = 480 minutes

So to find the number of periods we divide 480 by 20. Answer is 24

4 0
3 years ago
A box contains 10 red ribbons and 12 blue ribbons. Once a ribbon is picked, it is not replaced. What is the probability of choos
lora16 [44]
I belive the answer is 1.
This is because out of 22 ribbon there are 10 which are bue so the probability of blue ribbons is 10/22 and probability of red ribbon is 12/22. So your question was the probability of choosing a red ribbon then a blu ribbon. Because of the word "then" , this means it is simply asking you to add their probablity so after adding 10/22 with 12/22 your answer will come to 22/22 which is equal to 1.
3 0
3 years ago
A sphere with a diameter of 30 inches is placed in a cube. The sphere touches the lateral faces
Nina [5.8K]

Answer:

a) 30 inches × 30 inches × 30 inches

b) 27,000 inches³

c) 14,130 inches³

d) 12,870 inches³

Step-by-step explanation:

Edge of the cube = diameter = 30 inches

Volume of cube = s³

30³ = 27000 inches³

Radius = 30/2 = 15

Volume of sphere:

(4/3) × 3.15 × 15³

14130 inches³

Difference:

27000 - 14130

12870 inches³

5 0
3 years ago
An eagle is flying at a height of 275 feet and climbing at a rate of 65 feet per second. The equation for the height of the bird
77julia77 [94]
The slope represents the how fast the bird is climbing and the Y intercept represents where the bird started to climb
7 0
3 years ago
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