Why must eye protection be worn at all times in welding shop?

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126