2 Select the correct answer.
Which expression is equivalent to 3/238 - 7/18y, if y> 0?
OA 2ly 207
B. 21y? Voy
OC. 63y2y
OD. 126y2
Reset

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.

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13