Question

I need help with question 9 please!

Answer 1

You have a right angle so you would find 90-46=44 then you work backwards:subtract 4 from 44 which is 40 then divide by 2 you will get 20 your answer is A

Answer 2

The answer is A. 20 you know that the equation plus the angle that equals 46 are equal to 90 degrees so..... use the formula  
2x+4+46=90

simplify by adding 4 and 46
2x+50=90
subtract 50 from both sides
2x=40
divide each side by 2
x=20

and that's how you get your answer