Which steps can be used to solve for the value of y? 3( + 5) = 45

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Find the area of the triangle shown 3 by 6