What's 2x + 8 = 10 please help

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.

Could someone with number 1 and 2

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form