Answer: 16*pi
Step-by-step explanation: The equation for diameter is pi*diameter. Since you already know the diameter, just plug it in.
Answer:
Infinitely many solutions.
Step-by-step explanation:
5x-8y=-11
-10x+16y=22
---------------------
2(5x-8y)=2(-11)
-10x+16y=22
---------------------
10x-16y=-22
-10x+16y=22
---------------------
0+0=0
infinitely many solutions
Answer:
7/5
Step-by-step explanation:
3x + 5 + 2x - 12 = 0
5x - 7 = 0
5x = 7
x = 7/5
Answer:

Step-by-step explanation:
We convert some numbers to decimal fractions:
-2 = -2.00
-3/4 = -0.75
-0.45
3% = 0.03
0.36
We order
-2, -0.75, -0.45, 0.03, 0.36

other method
(use a calculator)

Area = 2,520m^2
(47+65)/2 = 56
56x45 = 2,520