This is how you do it. Set two equations equal to each other then solve. Plug in x for each equation, find the answers. AC is the base because it is not congruent to any other side.
Answer:
10.5
Step-by-step explanation:
The 99.87th percentile, or the area to the left of the 3 standard deviation mark it 99.87% better than everyone/everything else.
In math,
"of" is the same as "×" and "is" means "="
42.5% of x = 20.57
42.5% × x = 20.57
.425x = 20.57
x = 20.57/.425
x = 48.4
42.5% of 48.4 is 20.57
Answer:
20 hours.
Step-by-step explanation.
The total distance traveled was 400 miles. Then I divided 400 by 20. I got 20.