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matrenka [14]
3 years ago
11

Find the solution set for this equation. a^2 + 7a=0 Separate the two values with a comma.

Mathematics
2 answers:
Nesterboy [21]3 years ago
7 0

Answer:

a=(0,-7)

Step-by-step explanation:

a^2+7a=0

a^2+7a-7a=-7a

a^2=-7a

a=(0,-7)

olga2289 [7]3 years ago
4 0

Answer:

a = 0,-7

Step-by-step explanation:

a^2 + 7a=0

Factor out an a

a(a+7) =0

Using the zero product property

a=0   a+7 =0

a =0  a= -7

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What number is 150% of 92
Setler79 [48]
The answer is 138 because 92 * 150= 13,900 and 1*100= 100.
Then you divide 13,800 by 100 and get 138.

So the answer is 138.

Hope that helped. :) :0 :p :D :d

6 0
3 years ago
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A little girl kicks a soccer ball. It goes 10 feet and comes back to her. How is this possible?
Elanso [62]

She is standing in front of a wall which is 10 feet away when she kicks the ball and it hits the wall and comes back to her by the virtue of Newton's third Law of motion! She kicks the ball into the air vertically above her and the ball rises to 10 feet and then comes back to her by the virtue of gravity!

8 0
2 years ago
nathan smiled at 50 people one day and recorded that 36 people smiled back at him.Based on his observations how many people shou
Olegator [25]

Given :

Nathan smiled at 50 people one day and recorded that 36 people smiled back at him.

To Find :

How many people should Nathan expect to return a smile if he smiles at 650 people over a period of time.

Solution :

Ratio of people smiled by total number of people is :

R = \dfrac{36}{50}

Now, it is given that we have to use the given conditions.

Therefore, ratio will be same :

\dfrac{s}{650}=\dfrac{36}{50}\\\\s = \dfrac{36}{50}\times 650\\\\s = 468

Therefore, number of smiles Nathan expect to return is 468.

4 0
3 years ago
2.4.5
worty [1.4K]

Answer:

150 miles

Step-by-step explanation:

let m represent miles

$70 + .70m = $40 + .90m

subtract 40 from each side

$30 + .70m = .90m

subtract .70m from each side

$30 = .20m

divide both sides by .20

150 = m

5 0
3 years ago
If you know the area of a rectangle can you predict its perimeter? Explain
Anuta_ua [19.1K]

No.  The area doesn't tell you the dimensions, and you need
the dimensions if you want the perimeter.

If you know the area, you only know the <em><u>product</u></em> of the length and width,
but you don't know what either of them is.

In fact, you can draw an infinite number of <em><u>different</u></em> rectangles
that all have the <em>same</em> area but <em><u>different</u></em> perimeters.

Here.  Look at this.
I tell you that a rectangle's area is 256.  What is its perimeter ?

-- If the rectangle is 16 by 16, then its perimeter is 64 .
-- If the rectangle is 8 by 32, then its perimeter is 80 .
-- If the rectangle is 4 by 64, then its perimeter is 136 .
-- If the rectangle is 2 by 128, then its perimeter is 260 .
-- If the rectangle is 1 by 256, then its perimeter is 514 .
-- If the rectangle is 0.01 by 25,600 then its perimeter is 51,200.02


6 0
4 years ago
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