2x/3 - 5 = 21
2x/3 = 26
2x = 78
x = 39
OPTION A is the answer.....
Substitute the values into the equation
2(2)+4(-1)-5(1)
4-4-5
-5
For 1 the answer is Junior High B which is letter C
Evaluating each expression means to simplify the expression down to it's simplest form.
We can get the angle with
tan a= opposite side / adjacent side = 35ft/ 50ft=0.7, so a = arctan(0.7)=35°
look at the image