<span>Wanda started walking along a path 27 seconds before Dave. Wanda walked at a constant rate of 3 feet per second. Dave walked along the same path at a constant rate of 4.5 feet per second. How long after Dave starts walking will he catch up with Wanda ?
***
let x=travel time of Dave
x+27=travel time of Wanda
speed*travel time=distance (same for both Wanda and dave)
..
4.5x=3(x+27)
4.5x=3x+81
1.5x=81
x=54
How long after Dave starts walking will he catch up with Wanda ? 54 sec</span>
2(2)^2+3(2)+5=19 If you plug in the input of 2, you will get 19.
Answer: -3 13/40
Steps: (-⅛ + ⅖) - 3 ⅗
Convert mixed numbers to improper fractions: 3⅗ = 18/5
(-⅛ + ⅖) - 18/5
Remove the parentheses: -⅛ + ⅖ - 18/5
Find the common denominator which is 40.
So: -5/40 + 16/40 - 144/40
Since the denominators are equal, combine the fractions: -5 + 16 -144 divided by 40.
Add/ subtract the numbers: -5 + 16 - 144 = -133
= -133/40
Convert improper fractions to mixed numbers: 133/40 = 3 13/40
The answer is -3 13/40
