First you would turn this word problem into an equation.
10+8x=66
now solve for x
you should get x=7
Carl worked 7 hours.
Answer:

Step-by-step explanation:
Here first open the inner parentheses and use the distributive property,

Answer:
m<YVX = 49°
Step-by-step explanation:
Given:
m<YVZ = 52°
m<ZVW = 36°
m<XVU = 43°
m<YVX + m<YVZ + m<ZVW + m<XVU = 180° (angles in a straight line)
m<YVX + 52 + 36 + 43 = 180 (substitution)
m<YVX + 131 = 180
m<YVX = 180 - 131
m<YVX = 49°