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:
D
Step-by-step explanation:
First, we get the mean and median of the first data set WITH 5 years : mean = 15 median = 14, then remove the 5 years mean = 15.222 median = 14
Answer: 2.3
Step-by-step explanation:
9.2 is divided by 4 is 2.3 so the last quarter is 2.3
Answer:
R OR E
R'
Step-by-step explanation:
Or is union
And is intersection
' is not
4.99x2=9.98. 11.45x3=34.35. 9.98+34.35=44.33. 6% of 44.33 is 2.6598. 44.33+2.6598=46.9898. So the total is $46.99
