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Maurinko [17]
2 years ago
8

What two numbers multiply to -20 then add to -8?

Mathematics
2 answers:
VARVARA [1.3K]2 years ago
7 0

Answer:

-10 and 2

Step-by-step explanation:

1.  Think about what numbers multiply to -20:  -10 and 2, 10 and -2, -20 and 1, 20 and -1, 4 and -5, -4 and 5

2.  Then, think about which of the above adds to -8.  This leaves you with -10 and 2

oksian1 [2.3K]2 years ago
4 0

Answer: 2 and -10

Step-by-step explanation:

<u>Starter:</u>

Let x be one of the two numbers

Let y be the other number

-------------------------------------------------------------------

Solve:

Given

x + y = -8

xy = -20

Simplify

x = -8 - y

xy = -20

Substitution

(-8 - y)y = -20

Expand parenthesis

-8y - y² = -20

Add 20 on both sides

-8y - y² + 20 = -20 + 20

-8y - y² + 20 = 0

Solve quadratic equation

(y - 2) (y + 10) = 0

y = 2 or y = -10

x = -8 - y

x = -8 - (2) or x = -8 - (10)

x = -10 or x = 2

Hope this helps!! :)

Please let me know if you have any questions

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~ .........sʇuᴉod ǝǝɹɟ​
amm1812

Answer:

You are awesome :)

Step-by-step explanation:

Thank you!!

5 0
3 years ago
For the function of F defined by f (x) = x + 8. what is the value of x when f (x) = 10
melomori [17]

Answer:

x = 2

Step-by-step explanation:

f(x) = x + 8

f(x) = 10

10 = x + 8

minus 8 from the both sides

10 - 8 = x

2 = x

x = 2

7 0
3 years ago
HURRY UP YALL FIRST ANSWER GETS BRAINLIESTTT
Orlov [11]

Answer:

90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you

Step-by-step explanation:

7 0
3 years ago
In the PQRS triangle PQ=QR, QR side extended to S Show that PQ+RS=QS. -S Q R
Vitek1552 [10]

Answer:

Step-by-step explanation:

from the picture:

QP = QR

and

QR = RS

so

PQ + RS = QS

6 0
3 years ago
Solve the equation : 8+10^x=1008
Marizza181 [45]
Hi there.

I'm just going to put the answer for now. I might come back and edit my answer if I figure out how to solve this the long way.

All I did was figure out what exponent you raise 10 to. 

10³ = 1000

So, we now have 8 + 10³ = 1008

Edit:

I did it on paper - here it is broken down.

8 + 10^{x} = 1008

Subtract 8 from both sides.

10^{x} = 1000

We know that 10³ = 1000

<em>x</em> = 3

~
7 0
3 years ago
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