(2x - 5y) + (x +y) =
2x - 5y + x + y =
3x - 4y
or
-4y +3x
they are equivalent statements
Answer:
∠A=125°
Step-by-step explanation:
Well since the lines are parallel, ∠B is opposite ∠A which means ∠B=∠A

x=20°
Plugging x into the equation for ∠A.

∠A=125°
Answer:
x = -1 + 5y
Step-by-step explanation:
If you writing this equation in terms of x then the answer is correct, however, if there is a value for y, then you just need to sub it into y.
For example,
Find x when y = 3
x = -1 + 5(3)
= -1 + 15
= 14
Example 1: The angle is 42 deg and the length of the hypotenuse is 25. The side of length x is opposite the 42 deg angle.
opposite side
Thus, sin 42 deg = -------------------- => 25 sin 42 deg = x = opp side
25
25(0.669) = 16.7 units (answer)