It takes heidi 10 minutes to get to school going at a speed of 27 miles/hour. how long will it take her to get to school if she goes 40 miles/hour?

0.108 hour = 6.48 minutes.

Step-by-step explanation:

We have that Heidi travels the same distance in the two cases. Then, we are going to use the distance formula.

d = v*t, where d is distance, v the velocity and t the time.

We have that 10 minutes are 0.16 hours. Then,

.

Now, with 40 miles/hour we have

Then, it will take her 0.108 hour = 6.48 minutes to get to school.

b

step-by-step explanation:

b

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4