Answer:
The expression that represents his total time is given by "t = 7.5/s" where s is his speed against the wind.
Step-by-step explanation:
In order to solve this problem we will assign a variable to Curtis speed on the first leg of the trip, this will be called "s". Since the speed on the first part is "s" and the speed on the second part is 20% higher, then the speed on the second part is "1.2s". Each leg of the course is 9 miles long, therefore the time it took to go each way is given by:
time = distance/speed
First part:
t1 = 9/s
Second part:
t2 = 9/1.2s = 7.5/s
The expression for the whole course is the sum of each, so we have:
t = t1 + t2
t = 9/s + 7.5/s
t = (9 + 7.5)/s = (16.5)/s
The answer is 9.
This is a cube root.
9 cubed, or 9 the the third power, is 729
Answer:
A. 1ft
Step-by-step explanation:
1 x 1 = 1 squared
So 1 foot x 1 foot = 1 square foot
60 first 20 second 15 third 10 fourth nothing fifth
Answer:
D - 72
Step-by-step explanation:
32 divided by 4 is 8.
So 8 times 5 is 40.
32 plus 40 equals 72.