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3 years ago

9

3(1−9a)+22a=2(2a−9)−15 i need a step by step explanation please

2 answers:

SpyIntel [72]3 years ago

5 0

Answer:a=4

Step-by-step explanation:

Expand the brackets. Collect like terms. Get the same values on each side so it’s easier to isolate a. Divide 9 from 9a so that u get a by itself and this gives u the answer if 36/9 or 4.

motikmotik3 years ago

3 0

Answer:

a = 4

Step-by-step explanation:

first distrubute the 3 and then 2 in the equations to whatever is inside the parantheses:

3 ( 1-9a) + 22a = 2(2a-9) -15

3 - 27a + 22a = 4a - 18 - 15

then combine the terms:

3 - 5a = 4a -33

then isolate the variables and constants to one side, for example move the 5a to the right side of the equation and move the 33 to the left side of the equaiton and then simplfy

36 = 9a

divide both sides by 9

a = 4

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Answer: a. Radius of circle = $\sqrt{85}$

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Step-by-step explanation:

Given : Center of the circle = (3,10)

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a. To find the radius we apply distance formula (∵ Radius is the distance from center to any point ion the circle.)

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