# math

posted by
**Angel** on
.

I am a little lost on my homework can someone help me with these problems please!

With a GM MasterCard, 5% of the amount charged is credited toward a rebate on the purchase of a new car. Express the R as a function of the amount charged A

Write a formula that describes the functionfor this problem.

#2. Graph this inequality: y<2x+2

#3. y<-2x+1

#4. y<7

#5.4x+3y>24

Thanks!!

1. R = 0.05 A = A/20

2. The region that satisfies the inequality is all of the area below the

y = 2x +2 line. The slope of that line is 2 and the y-intercept is (2, 0). (That means it goes through the point x = 2, y = 0)

3. The region that satisfies the inequality is all of the area below the

y = -2x +1 line. The slope of that line is -2 and the y-intercept is (1, 0).

4. The region that satisfies the inequality is all of the area below the

y = 7 line.

5. Rewrite as

y > -(4/3)x - 8

The region that satisfies the inequality is all of the area ABOVE the

y = -(4/3)x - 8 line. The slope of that line is -4/3 and the y-intercept is (0, 8).

I cannot draw graphs for you with tools available at this website.