Two years ago, a baby elephant was 11 feet shorter than its mother. However, it grew 3 feet, and now its mother is only twice its size. How big was the baby elephant two years ago?

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step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

cluster sampling.

step-by-step explanation:

add -60 to 120 which will result in : 2x+3y=180

then subtract 2x: 3y=-2x+180

lastly, divide by 2: y= -2/3x+60

hope this is the answer you're looking for: )