Ann drove 638 miles in 11 hours.
At the same rate, how many miles would she drive in 9 hours?

638 miles / 11 hours = 58mph

So if he is traveling at 58 miles per hour for 7 hours, multiply the two numbers. 7(58) = 406

At the same rate of speed, Eric would travel 406 miles in 7 hours.

Step-by-step explanation:

I hope you undertand it

522

Step-by-step explanation:

638 miles11hours

x miles 9 hours

x = 638 * 9 / 11 = 522 miles

c.35

step-by-step explanation:

8+13=21

21+8=29

29+6=35

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3