Jennifer claims that the solution to 3(3x + 9) - 2x = 4x is x = -9. She shows the work below to justify her claim. Select all the justifications that are correct.

(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 ?

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29