Answer:
The first one is correct
Step-by-step explanation:
You can multiply the base and perpendicular height to find the area.
Answer:
x=-2
Step-by-step explanation:
-9x+1=-x+17
Add 9x on both sides:
1=8x+17
Subtract 17 on both sides:
-16=8x
Divide both sides by 8:
-2=x
Check x=-2!
-9x+1=-x+17 with x=-2
-9(-2)+1=-(-2)+17
18+1=2+17
19=19
19=19 is a true equation so x=-2 is correct.
Answer:
B) Subtract 12-4 to calculate the range of this data set
Let x be the number in the problem. When it states that x is "no more than -10", it means than it is less than or equal to -10. So, we have

x≤-10
In order to cancel out the

on the left and isolate x, we multiply both sides by

(since

·

=1). Thus, we have
x≤-10·

=-15
Therefore, x≤-15