exam Maths Puzzle Numerical Ability

Can someone please help me with these problems-

7x+3>9x-5

and

5x-5<2x+10

Read Solution (Total 0)

exam Other Question

1. a) If k(x)= -f(x) what would the new coordinates of P (which were 0,-1) be after the reflection? Give answer in (x, y) form.

Answer:

b) Consider the function f(x)x If sides a and b are known, angle B equals? Now my book says that if we know a and b that A= Tan-1 a/b and also says that B = 90 - A. My problem is 90 - A is not a answer to this