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Elementary Algebra
Word Problems
100
-x^2 + 8x - 12 1. Perform operations 2. Combine like terms
What is (5x^2 + 3x-4) - (6x^2 - 5x+8)
100
100 250 x .60 = 150 cows sold 250 - 150 = 100 cows left
Farmer Brown owns a herd of cattle. This year, his herd consisted of 250 cows. Then he sold 60% of his herd. How many cows does he have left?
200
(x+5)(x-4)
Factor the following: x^2 + x -20
200
$10 $150÷5=30 $40-$30=10
The university bookstore is having a sale. Course books can be purchased for $40 each, or 5 books can be purchased for a total of $150. How much would a student save on each book if he or she purchases 5 books?
300
x-2 -4÷2 = -2 x^2 ÷ x = x Combine terms x-2
What is (x^2 - 4)÷(x+2)
300
40 students. 15 = (S - 1/4S) x 1/2 15 = 3/4S x 1/2 15 = 3/8S 15 x 8 = 3/8S x 8 120 = 3S S = 40
At the beginning of a class, one-fourth of the students leave to attend band practice. Later, one half of the remaining students leave to go to PE. If there were 15 students remaining in the class at the end, how many students were in class at the beginning?
400
20% $15 - $12 = $3 3 ÷15 = 0.20 0.20 => 20%
Tom bought a shirt on sale for $12. The original price of the shirt was $15. What was the percentage of the discount on the sale?
500
4 hours miles to travel ÷ miles per hour = time remaining 240 ÷ 60 = 4
A car travels at 60 miles per hour. The car is currently 240 miles from Denver. How long will it take for the car to get to Denver?