a is the answer as the only change is the gradient being halved,
b would be if it was -1/2 and c would be1/2 x+1/2
Answer:
0.36 is a decimal and 36/100 or 36% is the percentage for 9/25.
Okay, now it is clear. Angle 2 is 41, angle 3 is 90-41=49. the answer is D
Number 8 is A because (3÷16)×24 =4.5
and number 9 is C