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qwelly [4]
3 years ago
9

The difference between a number and its square is 20. Find thenumbers.​

Mathematics
1 answer:
Elena L [17]3 years ago
4 0

Answer:

-4 or 5

Step-by-step explanation:

let number be x

x²-x=20

Rearrange

x²-x-20=0

(x+4)(x-5)=0

Separate

x+4=0, x-5=0

x=-4 or 5

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In this case, side c is greater than the altitude and is less than side a so 2 two triangles will be formed.

Source:
http://www.1728.org/trigssa.htm





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3 years ago
Find the range of the following equation for the domain {-4, 0, 3} f (x) = -2x^2 -3
Tamiku [17]

The range of the function is {-34, -2, -20}

<h3>How to determine the range?</h3>

The function is given as:

f(x) = -2x^2 - 2

The domain is {-4, 0, 3}

Substitute the domain values in the function.

f(-4) = -2(-4)^2 - 2 = -34

f(0) = -2(0)^2 - 2 = -2

f(3) = -2(3)^2 - 2 = -20

This means that the range of the function is {-34, -2, -20}

Read more about range at:

brainly.com/question/10197594

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7 0
2 years ago
Help me please my test is tomorrow!​
Marysya12 [62]

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4z +  2 = 10z - 1

Add sides 1

4z  + 2  + 1 = 10z - 1 + 1

4z + 3 = 10z

Subtract sides 4z

- 4z + 4z + 3 =  - 4z + 10z

3 = 6z

6z = 3

Divide sides by 6

\frac{6z}{6}  =  \frac{3}{6}  \\

z =  \frac{1}{2}  \\

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3y = y + 3

Subtract sides y

- y + 3y =  - y + y + 3

2y = 3

Divide sides by 2

\frac{2y}{2}  =  \frac{3}{2}  \\

y =  \frac{3}{2}  \\

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

Thus the correct answer is :

a) \: y =  \frac{3}{2}  \: , \: z =  \frac{1}{2}  \\

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4 0
3 years ago
Find the differences between the values and the mean. then square each difference 39 42 45 47 52
Karolina [17]
The correct answer is 45
8 0
4 years ago
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