Answer:
D
Step-by-step explanation:
given the 2 equations
x + 2y = 27 → (1)
2x + 3y = 46 → (2)
Rearrange (1) expressing x in terms of y by subtracting 2y from both sides
x = 27 - 2y ← substitute into (2)
2(27 - 2y) + 3y = 46
54 - 4y + 3y = 46
54 - y = 46 ( subtract 54 from both sides )
- y = - 8 ( multiply both sides by - 1 )
y = 8 → D
Answer:
LN=10
Step-by-step explanation:
if LM = 5 and MN = 5 then LN=10
180 degrees= a whole line
180-102=78
So m13 should equal 78°
if you do not have a Unit Circle, this is a great time to get one, you can find many online just do a quick search for "unit circle".
Check the picture below.