Answer:
r = -3
Step-by-step explanation:
- 60= - 24 + 12r
Add 24 to each side
- 60+24= - 24+24 + 12r
-36 = 12r
Divide each side by 12
-36/12 = 12r/12
-3 =r
Answer:
23
Step-by-step explanation:
multiply the cost by 3
Answer:
24,000,000 hours
Step-by-step explanation:
1,000,000 days x 24 hours = 24,000,000 hours
Step-by-step explanation:
Let's say x is the length of the first piece.
The second piece is 2x.
The third piece is 2x.
So the total length is:
x + 2x + 2x = 279
5x = 279
x = 55.8
That means 2x = 111.6.
So the first piece is 55.8 feet, the second piece is 111.6 feet, and the third piece is also 111.6 feet.
Answer:
t= 52 seconds
A= 7,903 ft
Step-by-step explanation:
So start by writing each plane as an expression.
Plane A
3687+65.5*t is an expression for the ascent
Plane B
5000+40.25*t is an expression for the ascent
to find the time when they are at the same altitude set them equal to each other
3687+65.5*t = 5000+40.25*t
25.25*t = 1313
t= 52 seconds
to find the altitude solve one of the expressions with t=52
A =3687+65.5*52= 7093 ft