PLS HELP Using the picture below given m∠PQS = (5x +3) and m∠SQT = (10x-5) and m∠PQT = (17x-16), find x and the measures of each angle.

(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 ?

Place the following steps in order to complete the square and solve the quadratic equation,

From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day