Those addends are in the same order on the left and right, only the parentheses have changed. That's the
Associative Law of Addition
Answer:
B) 1820
Step-by-step explanation:
10% = 2600 ÷ 10 = 260
30% = 260 x 3 = 780
2600 - 780 = 1820
Hope this helps! :D
<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>
