I don't understand it sorry
1. Let hardcover books = X
Paperback books would be 4x -3 ( 3 less than 4 times)
Now you have:
X + 4x-3 = 447
Simplify:
5x - 3 = 447
Add 3 to each side:
5x = 450
Divide both sides by 5:
x = 450/5
x = 90
He has 90 hardcover books.
2. 300 miles / 25 miles per gallon = 12 gallons of gas.
12 gallons x $$ per gallon = $48 dollars
3. Subtract base pay from total:
1916 - 800 = 1,116 worth of commissions.
Divide commissions by percentage:
1116 / 0.09 = $12,400 total sales.
4.
Find the median of the heights: 65-50 = 15. 15/2 = 7.5
Median = 50+7.5 = 57.5
The equation would be |h-57.5| < 7.5
Step-by-step explanation:
Quotient of s and r is s/r
s/r to the 3rd power = (s/r)^3
Answer:
Step-by-step explanation:
3(b-4)=5b-2
distribute first!
3b-12=5b-2
10=2b
b=5
digit #1 - 9 numbers (1-9)
digit #2 = 9 numbers (0-9 minus the first digit)
digit #3 = 8 numbers ( 0-9 minus the first 2 digits)
9*9*8 = 648 combinations
