Best answer gets !

solve for x:

10°
18°
20°
22.5°

x=10

Step-by-step explanation:

Because the image shows a right angle, we know it's 90 degrees. the two angle measures added together to create the 90 degrees are represented by 4x and 5x, so;

4x+5x=90 (combine like terms)

9x=90 (divide each side by 9 to isolate the variable)

x=10

c. (3,2,6) is the answer.

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8