Find x.

a. 23

b. 30

c. 40

d. 45

it's c

Step-by-step explanation:

40°

Step-by-step explanation:

from the picture this is an isoscele triangle, 2 equal side (PQ=QR and angle P = angle R)

so

x + 10 = 2x - 30

10 + 30 = 2x - x

40 = x

check

40 + 10 = 2 * 40 - 30

40 = 2 * 40 - 30 - 10

40 = 40

the answer is good

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743