Answer:
31.5 cm²
Step-by-step explanation:
Calculate area of a triangle with this formula:
Area =
base * height
Substitute in known values
Area =
7 * 9
Multiply 7 by 1/2
Area = 3.5 * 9
Multiply
Area = 31.5 cm²
Hope this helps :)
Answer:
y = x - 7
Step-by-step explanation:
Answer:
70/30 since 30 was the original price then x over 100 and cross multiply and get 7,000 and divide that by $30
Step-by-step explanation:
Answer:
<h2>30</h2>
Step-by-step explanation:
Given the expression
, on simplification we have;

Hence the equivalent value of the expression is 30
Answer:
Sophia's time was either 6 above or 14 below the average
Step-by-step explanation:
We know two things about the time:
1. Jacob was 4 mins below average
2. Sophia was 10 minutes different than Jacob
We don't know if she was quicker or slower, however. So we can work out both.
We can take Jacob's time as -4 since he was 4 BELOW the average. If we take -4+10 this would represent if Sophia was faster than Jacob.
-4+10=6.
Now the other way. -4-10=-14.