There is no picture for me to check
Answer:
? = 43.8°
Step-by-step explanation:
cos ? = 13/18 = 0.7222
? = 43.8°
Finish what There is not enough information
Answer:
(x, y) = (3, 5/2)
Step-by-step explanation:

I'll solve by elimination here. If you invert the second equation and add it to the first, 2y and -2y would cancel out.

Now just add those from top to bottom.

Nothing else needs to be done for that part. Now, you can pick either equation and use the known value of x to solve for y.

(x, y) = (3, 5/2)
Answer:
the answer is 10 days
Step-by-step explanation:
10 workers⋅5 days ⋅2 hoursday=100 worker-hours
2 workers ⋅5 hoursday=10 workers-hoursday
100 worker-hours⋅1 day10 worker-hours=10 days