Question

Daisy is going 12 mph and Sally is going 8 mph if they where 60 miles apart how many hours would it take for them to meet up

Answer 1

Answer:

3 hours

Step-by-step explanation:

we know that

The speed is equal to divide the distance by the time

Let

s ----> the speed in mph

d -----> the distance in miles

t ----> the time in hours

x ----> distance traveled by Daisy to the meeting point

60-x ----> distance traveled by Sally to the meeting point

so

$s=\frac{d}{t}$

Solve for d

$d=st$

Distance traveled by Daisy to the meeting point

$d=st$

we have

$d=x\ mi\\s=12\ mph$

substitute

$x=12t$ ----> equation A

Distance traveled by Sally to the meeting point

$d=st$

we have

$d=(60-x)\ mi\\s=8\ mph$

substitute

$60-x=8t$ ----> equation B

substitute equation A in equation B

$60-12t=8t$

solve for t

$12t+8t=60\\20t=60\\t=3\ hours$