Nicole has 28 nickels and dimes that amount to $1.85. How many of each coin does she have?
19 nickels; 9 dimes
200
3/4 x = 9
12
200
|x| = -5
no solution
200
Solve P = 2L + 2W, for W
W = (P-2L)/2
200
Find three consecutive numbers so that three times the first number is equal to 9 more than the sum of the other two.
12,13,14
200
Zachary leaves Milestone and travels north in his new sports car three times as fast as Aaron travels south from Milestone on his racing bike. In 3 hours they are 240 miles apart. Find the speed of each.
Aaron - 20 mph; Zachary - 60 mph
300
7x - 2x - 5 = 15
4
300
|x - 5|= 4
x = 9, 1
300
Solve F = (mv)/t, for t
t = (mv)/F
300
The product of 2 times the sum of a number and 5 is 18. What is the number?
4
300
A cashier has 25 bills consisting of twice as many ones as tens, two fewer fives than ones, and the rest twenties. If the total value is $140, find how man of each she has.
ones - 10; fives - 8; tens - 5; twenties - 2
400
3(y+ 4) = 15
1
400
|2x - 1| = 17
9, -8
400
Solve 2x - 3y = 12, for y
y = (12-2x)/-3
400
If one third of a number is subtracted from twice the number, the result is 55. What is the number?
33
400
Micah Beasley invested $10,000 for one year, part at 10% annual interest and part at 14% annual interest. His total interest for the year was $1280. How much money did he invest at each rate?
$3000 at 10%; $7000 at 14%
500
1/8 x + 3/4 x = 13
12
500
5|2x + 1| - 4 = 1
0, -1
500
Solve L = a + d(n - 1), for a.
a = L - d(n - 1)
500
The difference between two numbers is 15. If 8 is added to twice the greater number, the result is 4 less that 3 times the lesser number. Find the two numbers.
42,57
500
The senior class sold 580 Christmas cards for $483. They sold some of the cards for $0.75 each and the rest for $0.95 each. How many cards did they sell at each price?