Write an expression that is equivalent to 2/3 (4x + 9).
a 8/3x + 6
b 8/3x + 9
c 2/3x + 6
d 2/3 x + 9
explain

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?