<u><em>Go to google and google it and then go to Math and it will explain it to you. It will also show you how to get the answer.</em></u>
Answer:
a = 2
Step-by-step explanation:
14a - 21 - 5a = -3
9a - 21 = -3
9a = -3 + 21
9a = 18
a = 2
Answer:
the third expression
Step-by-step explanation:
x=10.8
(x2 / 18) + 33.52
10.8 x 10.8=116.64
116.64 divide by 18=6.48
6.48 + 33.52=40
Answer for the second question:
5*2 is 10
10 *2 is 20
20*2 is 40
40*2 is 80
80 *2 is 160
That's five hours
160*2 is 320
320*2 is 640
640*2 is 1280
1280*2 is 2560
The answer should be 2560
I forgot how to do it with the equation sorry
The correct answer is (x-3).
An easy way to figure this out is to find two numbers that multiply to -21 and add to 1 (however, make sure you keep in mind the leading coefficient of 2).
The easiest way is to find factors that multiply to the constant term, and then check and see whether the linear variable terms (when multiplied out) add up to the term we see in the quadratic.
Basically, just use a guess and check method by multiplying out your educated “guess” factors.
Hope this helps!