I need the answers to both pls :)

4) D

5) C

Step-by-step explanation:

4) sqrt(10)×sqrt(8) = sqrt(80) which is not a perfect square

5) 14x + 13 + 2(6x-4 + 12x+3)

= 50x + 11 units

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.