Answer:
103
Step-by-step explanation:
(-8)²-3(-8)+15
64+24+15
103
Answer:
70 offices
Step-by-step explanation:
21 ÷ 3 to get amount per floor, 7 per floor, 7 × 10 = 70, 70 offices
Answer: 
Step-by-step explanation:
If the volume of a sphere is

Where
is the radius
The volume of a hemisphere is half the volume of the total sphere:


Solving this equation:

Finally:

Answer:
∠ 1 = 130°, ∠ 2 = 50°
Step-by-step explanation:
∠ 1 and 130° are alternate angles and congruent, so
∠ 1 = 130°
∠ 2 and 130° are same- side interior angles and are supplementary, so
∠ 2 + 130° = 180° ( subtract 130° from both sides )
∠ 2 = 50°
Answer
-14
Step-by-step explanation: