Answer:
Let d = the one-way trip
Write a time equation: time = dist/speed
time out + time back = 4.5 hrs
d/80 + d/100 = 4.5
Multiply by 400 to clear the denominators
400*d/80 + 400*d/100 = 400(4.5)
Cancel the denominators
5d + 4d = 1800
d = 1800/9
d = 200 miles max distance
Answer: 48 inches, 14 inches, 21 inches and 14 inches.
Step-by-step explanation:
1. The perimeter of the trapezoid is the sum of the lengths of its sides. You know that the perimeter is 97 inches, then, you can write the following expression:

2. Now, you must solve for x, as following:

3. Then length of each side is:



Answer:
He will save 590 dollars by the end of the year
The truck's values will decrease by 20%. Thus,
New value = 14000 - 0.2 x 14000
New value = 14000(1 - 0.2)
New value = 14000(0.8)
New value = $11,200