Angle a and angle b are complementary angles. the measure of angle a is 42 degrees. which equation represents this situation with x representing the measure of angle b

⓵ When two angles are completely, it means that the the sum of the two angles together is 90°!

⓶ Knowing that, if your angle a is 42°, you need to subtract 42° from 90° in order to have the measure of your angle b!

⓷ You can have different equations depending on what you are looking for.

For example, you could write that :

× = 90° - angle a

Or you could writhe that :

× = (angle a + angle b) - angle a

I’m not sure what kind of equation you are looking for, but as long as your equation (so ×) equals 48° (90° - 42°), I think you should be fine!

I really hope this helps, if there’s anything let me know! ☻