How many 3/4 pound pieces can be cut from a giant 1200 pound chocolate Easter bunny?

3x + 4y = 5 x- 3y = -7 solve by substitution

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great

Ameteorologist is studying the monthly rainfall in a section of the brazilian rainforest. she recorded the monthly rainfall, in inches, for last year. they were: 10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 fill in the missing values in the formula. what is the variance?