Can you show me how to answer this question?

Rollerskates: 9 miles/hr

Bike: 17.5 miles/hr

Step-by-step explanation:

How fast→ referring to speed

Speed= distance/ time

Rollerskates:

Distance= ¾ mile

Time= 5 mins

Since the question wants the speed to be in miles per hour, convert the time from minutes to hours.

60 mins= 1 hr

1 min= 1/60 hr

Time= 5/60 hr

Speed

Bike:

Distance= 3.5 miles

Time

= 12 mins

= 12/60 hr

= ⅕ hr

Speed

= distance ÷ time

= 3.5 ÷ ⅕

= 3.5 ×5

= 17.5 miles/hr

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

eve and marks ratios are equivalent

step-by-step explanation: