Mary is traveling cross country on a road trip. so far, mary has traveled 200 miles in her car and 200 miles by train. the car traveled at a rate that was 30 miles per hour slower than the train. mary modeled the total time for her trip with the following expression. what does x - 30 represent in this situation? the speed of the car the speed of the train the total distance traveled by the train the total distance traveled by the car

I don't know what the answer is to this question.

Step-by-step explanation:

I don't know what the answer is to this question.

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

it would not be increasing by nothing that i can see probably by 25 percent that is all i can sat\y for now if i have any thing else to say i will edit this.

step-by-step explanation: