1. Word Problems

2. Homework #1
With a tailwind, a helicopter flies 270 miles in 1.5 hours. When the helicopter flies back against the same wind, the trip takes 3 hours. What is the helicopter’s speed in still air? What is the speed of the wind?
w = speed of wind (mph)
h = speed of the helicopter (mph)
With
the wind
Against
the wind

3. Homework #1
With a tailwind, a helicopter flies 270 miles in 1.5 hours. When the helicopter flies back against the same wind, the trip takes 3 hours. What is the helicopter’s speed in still air? What is the speed of the wind?
w = speed of wind (mph)
h = speed of the helicopter (mph)
Helicopter = 135 mph
Wind = 45 mph

4. Homework #2
A barge on the Sacramento river travels 24 miles upstream in 3 hours. The return trip take the barge only two hours. Find the speed of the barge in still water.
b = speed of barge (mph)
c = speed of the current (mph)
With
the current
Against
the current

5. Homework #2
A barge on the Sacramento river travels 24 miles upstream in 3 hours. The return trip take the barge only two hours. Find the speed of the barge in still water.
b = speed of barge (mph)
c = speed of the current (mph)
barge = 10 mph
current = 2 mph

6. Algebra 1B
Homework #3
Bubba has a collection of 95 coins, consisting of only nickels, dimes and quarters. If the number of quarters and dimes combined is 60, and the total value of all his coins is $12.70, how many dimes does he have?
Define variables:
Write two equations
d = number of dimes E1
q = number of quarters E2
Number of nickels = 35
Value of nickels = $1.75
Value of dimes and quarters = $10.95
Mr DeVor

7. Homework #1
The length of a rectangle is three more than it’s width. If the perimeter is 66 meters, find the area of the rectangle.
Define variables:
Write two equations
L = length E1
W = width E2

8. Algebra 1B
Extra Credit Problem
From homework on 12/12
The numerator of a fraction is one less than the denominator. If 1 is subtracted from the numerator, and the denominator is unchanged, the resulting fraction has a value of 3/4. Find the original fraction.
Define variables:
Write two equations
n = Numerator E1
d = Denominator E2
Mr DeVor