Which is the variable in this equation ?

3v - 2 = 10
answer is on the pic.

Which ahows the graph of the solution set of 6x+4y< 12

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?