Answer:
Step-by-step explanation:
12: 8,700
13: 42
14: 70,000
15: 5,000,000,000
16: 2,210
17: 34,100
18: 1,650
19: 149
20: 290,000
7. the formula for octagon is a=2(1+radical2)s^2
s=4
a=about 77.25
8.
Answer: Its 3 ^(x-2) + 2
Step-by-step explanation:
Because y increases when x increase base is 3. Try
x = 2 gives 3^(-1) + 2 = 2,33 and x = 3 gives 3^0 + 2 = 3
21+45+70=136
136+(2+x)=180
First subtract 136 from both sides
(2+x)=44=M<ROS
Subtract 2 from both sides
x=42
Its tricky naa ans is -3, -3+9=6
