Answer:
10x+15
Step-by-step explanation:
3rd one
x-y =8
x/y=3
=> 3y-y=8
=> 2y = 8
=> y = 4
=> x = 4+8 =12
True: The trigonometric ratios sine and secant are reciprocals of each other
7pq( 2 + 5r)
