Answer:
see below
Step-by-step explanation:
2d+21 ≤11
Subtract 21
2d+21-21 ≤11 -21
2d ≤-10
Divide by 2
2d/2 ≤-10/2
d≤-5
Answer:
a) 37º
b) 143º
c) 2x - 5 = 143
Step-by-step explanation:
a) Angles 5 and 7 are vertical angles and therefore have the same measurements.
b) Angles 5 and 6 form a straight line and are therefore supplementary (add up to 180º). 180 - 37 = 143.
c) We found the measure of angle 6 is 143º in part b. We can set that equal to 2x - 5. Therefore the equation is 2x - 5 = 143.
Answer:
18 feet long.
Step-by-step explanation:
Let the bottom section be x feet long, then:
x/6 + x/2 + x = 180
Multiply through by 6:
x + 3x + 6x = 1080
10x = 1080
x = 108 feet,
So the top section = 108/6
= 18 feet long.
