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

-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

2 and -10

Step-by-step explanation:

Starter:

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

s

step-by-step explanation:

b. 18

step-by-step explanation:

so the equation for this is:

ab^2=ac⋅ad

ab being the top length of 6 and ac being the length of 2 and ad being the length of x. let's plug into the equation:

6^2 = 2x

now lets just solve for x:

36 = 2x

18 = x

i hope that !