6th grade math help me please

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.

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?