If mary drove 525 miles in 7 hours at an average speed of 75 miles per hour, how fast would her average speed need to be to make the trip in 5 hours (a little speed

525/5 = 105 miles per hour for the speed demon.

Well it was quite simple to answer this question. As we knew the total distance that the speed demon had to cover in a specific amount of time that is obviously 5 hours we can simply divide the total distance by the time we had to travel.

Other wise obviously we could have calculated the average speeds separately and could have done it in a different manner.

the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is

600,000,000,000, or 6e14

step-by-step explanation: