It would be B. $0.24x+$24.78 = $30.78.
24.78 is the constant where that is the starting value. For each text 0.24 is added on so that would be multiplied with x, which is the number of texts sent.
60 minutes = 54km/h
6 minutes = 5.4 km/h
24 minutes = 21.6 km
Answer:
x = 1 y = 3 z = 1
Step-by-step explanation:
(1) x - 3y - z = -9 (2) -2x + y + 2z = 3 (3) 2x + y + 3z = 8
2x(1) <u>2x - 6y - 2z = -18</u> (2) <u>-2x + y + 2z = 3</u>
- 5y = -15 2y + 5z = 11
y = 3 2(3) + 5z = 11
6 + 5z = 11
5z = 5
z = 1
x - 3(3) - 1 = -9
x - 9 - 1 = -9
x - 10 = -9
x = 1
Note: If you write your equations across your paper, then the work can just flow down the paper. It makes it so much easier to show the work you have done. OK?
4(-5y) + 2y = 180
-20y + 2y = 180
-18y = 180
y = -10
x = 50
