If each painting takes 3 hours, and he has to do 8 then he would spend 24 hours doing all 8 portraits
Answer:
z = 8
Step-by-step explanation:
All angles inside a triangle add up to 180 so:
90 + 40 + 5z + 10 = 180
5z + 140 = 180
5z = 40
z = 8
Check the picture below.
notice, the gift box is just 6 rectangles stacked up to each other at the edges,
left and right, two rectangles of 32x40
top and bottom, two rectangles of 25x32
front and back, two rectangles of 25x40
so, just get the area of all 6 rectangles, add them up, and that's the "surface area" of the rectangular prism, and that's how much paper will be needed to cover it.
<h2>
Answer: 8</h2>
Step-by-step explanation:

Therefore, Mel has to work at least 7.5 hours or 8 total hours.