Answer:
I think that the original price would be $30, but I'm not completely sure.
Step-by-step explanation:
Half (50%) of 40 would be 20, and half of 20 (25%) would be 10. Add 10 to 20 to get 30, because you are adding the %25 back to $20.
Hope this helps!
Answer:
C
Step-by-step explanation:
Since having 1 and 5 as the most likely result is highly unlikely, the answer being 7 points on both numbers would be unfair resulting in C being the answer.
Joe paid $105.00. He drove 300 miles at $.25 per mile which equals $75.00. Adding the $30.00 per day charge for 1 day to the $75.00 gives us the answer of $105.00.
Answer:
6 hours
Step-by-step explanation:
The formula for work is
1/a + 1/b = 1/c
where a and b are the times working alone and c is the time working together
Let x= time for Sydney
x-3 = time for Toni
1 /x + 1/ ( x-3) = 1/2
Multiply by 2x(x-3) to clear the denominators
2x(x-3)(1 /x + 1/ ( x-3)) = 1/2 *2x(x-3)
2( x-3) + 2x = x(x-3)
Distribute
2x-6 +2x = x^2 -3x
Combine like terms
4x-6 = x^2 -3x
Subtract 4x from each side
-6 = x^2 -3x-4x
Add 3 to each side
0 = x^2 -7x +6
Factor
0 = (x-6) (x-1)
Using the zero product property
x-6 = 0 x-1 =0
x=6 x=1
But x cannot =1 because that is less time than together
x=6