What is the value of the expression 15x - 4y when x = 2 and y = 6

Find the slope of the line y =8/9x + 1.

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

Write the rational number in lowest terms 99/-15