What is the y-intercept of a line that has a slope of -3 and passes through point (0, -7)?

(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 ?

Evaluate cos2θ for cosθ = square root of 3/2

The reflexive property of congruence lets you say that ∠pqr ≅