Answer:

Step-by-step explanation:
hope this helps.
The solution for y=2x-4: y= -8
The solution for y=3x-4: y= -12
11 because 275÷25 is 11. 11 calculators would cost 275 in total
Answer:
x = 67; y = 40
Step-by-step explanation:
You are correct with y. Angles y + 23 and 63 are vertical, so they are congruent. That gives you y + 23 = 63, which gives y = 40.
To find x, look at angles 2x - 17 and 63.
They are adjacent angles whose outside rays lie on a line. Angles like these are called a linear pair, and they are supplementary. That means their measures add up to 180 deg.
2x - 17 + 63 = 180
2x + 46 = 180
2x = 134
x = 67