Answer:
15
Step-by-step explanation:
Let x represent the number of algebra problems. Then the number of geometry problems was 27-x and the total working time was ...
2x +5(27 -x) = 90
-3x = 90 -135 . . . . subtract 135
x = -45/-3 = 15 . . . divide by -3
Rob had 15 algebra problems for homework.
Answer:
5
Step-by-step explanation:
t-u/v
substitute (-1) - (-3)/(1/2)
divide (-1) - (-6)
simplify (-1) + 6
add 5
Y=20x -1500, y equals the prophet, x is the number of books, 20 is the money made after taking out the cost of production, 1500 is a cost that only occurs once.
There is a 6% decrease as 639.20 divided 680 is 0.94. Meaning 6% decrease.
