Stefan bought 3 hamburgers and 4 fries for a total cost of $26.50.

Step-by-step explanation:

system of Linear Equations 2 variables

hamburger = x

fries = y

Stefan

3x + 4y = $26.5

Nancy

4x + 2y = $29.5

elimination

3x + 4y = $26.5 | ×1 |

4x + 2y = $29.5 | ×2 | -

3x + 4y = $26.5

8x + 4y = $59.-

-5x = $-32,5

x = $-32,5 ÷ -5

x = hamburger = $6.50

I hope this help

Hello!

In slope intercept form, y is the second number on the ordered pair while x is the first. We will plug in each pair to see if it is correct.

28>25-2 Correct
28<25+3 Incorrect

20>20-2. Correct
20< 20+3. Correct

25>-25-2. Correct
25<-25+3. Incorrect

23>20-2. Correct
23<20+3. Incorrect

The only correct answer is B.

Hope this helps!