If the length of the ladder is x then 12/x=cos70, so x=12/cos70=35’ approx, answer c.
By the Law of Sine,
Solve for x and get x = 65.7.
X=2y
2x+5y=9
substitute the x=2y into the second equation
2(2y)+5y=9
multiple the 2y by 2. 4y+5y=9
combine like terms. 9y=9
divide the 9 out from both sides. y=1
plug the y back into the first equation
x=2(1)
multiply. x=2
your answer is: x=2
y=1
Answer:
answer is first option
wherein, a = 1, b = -3, c = -5
