2/3x - 1/2y = 3
1/2x + y = 5

which of the following systems is equivalent to the given system?

a) 2x - y = 18 and x + 2y = 10
b) 4x - 3y = 18 and x + 2y = 10
c) 2x - 3y = 3 and x + 2y = 5

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

For each proportion find the unknown number x 1/5/8=×/15