Answer:
Let number of laps she walked be equal to L
L=$7
7L = $105 (equation)
OPTIONAL: If you want to find how may laps she walked, divide both sides by 7
L = 105/7 = 15
She walked 15 laps
Step-by-step explanation:
5 to the 4th power is 625. 625 divided by 25 is 25. 5 to the 2nd power is 25. Therefore the answer came out as 5 to the 2nd power.
9514 1404 393
Answer:
13 cm wide; 15 cm long
Step-by-step explanation:
Let w represent the original width. Then the original length is (w+2) and the original area is w(w+2). After the decrease, the width is (w-1) and the length is (w+1). The decreased area is (w-1)(w+1). The difference between these areas is 27, so we have ...
w(w+2) -(w-1)(w+1) = 27
w^2 +2w -(w^2 -1) = 27
2w +1 = 27
w = (27-1)/2 = 13
The original piece of cardboard was 13 cm wide and 15 cm long.
