Brian wants to build a ramp that leads to a storeroom 5 meters above the ground.  he wants the ramp to be 10 meters long.  what should the angle of elevation of the ramp be? 15°30°45°60°

It would be 30

Step-by-step explanation:

I did it on plato

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180