3x + 20 + 9x - 7
What is the answer have a great day and thank you

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.

Which best explains why this triangle is or is not a right triangle?

Find the area of an equilateral triangle with a side of 6 inches