Answer:a=-8
Step-by-step explanation:
4+7a=12+8a
So first you want to have the variables on the same side
4+7a-7a=12+8a-7a
This is how you got the 7a to the right side. Then you subtract 8a-7a So the equation becomes
4=12+a
Now there are two ways of doing this.
1. 4-12=12-12+a
You moved the 12 to the left side so you have the same variable on one side
4-12=-8
So then a=-8
Or
2. 4-4=12-4+a
0=8+a
then you would have to subtract 8 to keep 'a' by itself
-8=8-8+a
simplify it
-8=a
same thing
Answer:
A is correct
Step-by-step explanation:
Yes it can be. (3x-7) by (3x-7) would be one solution for the square, but (7-3x) by (7-3x) would work too.
X would have to be either -(1/3) (which couldnt happen because you cant have negative lengths) so it has to be 5
Ok so when you toss a coin in the air there are many factors (wind, dimensions of the coin rotational velocity etc.) which can affect the probability of coin to be heads or tails (1/2) and it can become biased.
So a fair coin is an ideal coin which gives a perfect 50:50 (1/2) outcome for heads or tails unbiased of any factor.
