The area of the triangle above is 21. What is the value of x ?

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.

The table represents a linear function. what is the slope of the function? –6 –4 4 6

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?