Answer:
t = 5
Step-by-step explanation:

Subtract 19 from 39
Divide by 4
Answer:
45 minutes is 3/4 of an hour, so find 3/4 of 12.
Divide 12 by 4 to get 1/4 of 12. That is 3.
3/4 is 3 of those, so multiply it by 3 to get 9.
So, she will have biked 9 miles.
Answer:
The height of the triangle is always the measurement of a line (often shown as dashes) that is perpendicular to the base and extends to the opposite angle at the top of the triangle.
If it is a right triangle, and the right angle is at the bottom, the side extending up from the right angle will be the height. But this is not always the case.
Answer:
C.None of these
Step-by-step explanation:
atleast I think
Answer:
a=2/3
Step-by-step explanation:
3(4a+1)+3a=13
12a+3+3a=13
15a+3=13
15a=10
a=2/3