The sum of one half of a number and 6 equals one third of the number, what is the number?
a.
-36
c.
-24
b.
-42
d.
-48

Solve 2^x=32 and rewrite this equation in a logarithmic form

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

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