Coach Sutton has her athletes do regular timed runs. At the last practice, Christine completed a timed run of 1.2 miles in 10 minutes. At the practice before that, she ran 3.2 miles in 25 minutes. What was Christine's average speed over the two runs?

The average speed of Christine is 0.125 miles per hour.

Step-by-step explanation:

At the last practice :

Christine completed a timed run of 1.2 miles in 10 minutes.

At the practice before that :

she ran 3.2 miles in 25 minutes.

To find the average speed :

"The formula for average speed is total distance divided by total time."

Average speed = (D1 + D2) / (T1 + T2)

⇒ (1.2+3.2) / (10+25)

⇒ 4.4 / 35

⇒ 0.125 miles / hour

∴ The average speed of Christine is 0.125 miles per hour.

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3