<span>(14.2a + 9.8b) - (13.1b - 0.2a) - (3.7a + 4.8b)
</span>14.2a + 9.8b - 13.1b + 0.2a - 3.7a - 4.8b
(14.2a + 0.2a - 3.7a) + (9.8b - 13.1b - 4.8b)
10.7a - 8.1b
Answer:
diameter = 8 miles
Step-by-step explanation:
Area of a circle = πr²
πr² = 50.24
3.14*r² = 50.24
r²= 
r² = 16
r² = 4²
r=√4²
r = 4 miles
diameter = 2 *radius = 2*4 = 8 miles
Answer:
r=-6
r=-1
Step-by-step explanation:

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Answer: x = -3
Step-by-step explanation:
3x - 5 = 10 + 8x
3x - 8x = 15
-5x = 15
x = -3