If the divisor is a decimal then you must multiply by a power of 10 to make it a whole number. why is it important to multiply the dividend and the divisor by the same power of 10?

Sample response: The dividend and the divisor are both multiplied by the same power of 10 so that the answer will be the same quotient as the orgininal problem. Both numbers have to have their decimal points moved to the right the same number of times.

three-fourths of an hour

36÷48=0.75

0.75=

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x