Answer:
Step-by-step explanation:
Don't use 0 as a substitute for θ. 0 is always 0.
cosθ = -5/(2√15)
secθ = 1/cosθ = -2√15/5
Answer:
y = 16
Step-by-step explanation:
2y + 3 = 4y - 29
2y - 4y = - 29 - 3
2y - 4y = - 29 - 3
- 2y = - 32
-y = -32/2
-y = -16
y = 16
Answer:
0 degrees
Step-by-step explanation:
If the temp. -9 then +9 it would 0 out.
Answer:
1. x = 2 y = 1
2. x = 17 y = 29/3
Step-by-step explanation:
1. Use elimination
-4x+3y=-5
4x-5y=3
x's cancel, so add them
-2y = -2
y = 1
substitute
4x -5(1) = 3
4x - 5 = 3
4x = 8
x = 2
2. Use elimination
2x+3y=36
10x-6y=12
Multiply top equasion by 5
10x+30y = 360
10x-6y = 12
x's cancel so subract
36y = 348
y = 29/3
Substitute
2x+3(2/3)=36
2x+2 = 36
2x = 34
x = 17