David added 2 and 3 using the number line tool Which of the following errors did he make?
He started at 2 instead of zero
He moved right 2 units for positive 2
O He moved night

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of