Determine whether or not the equations represent a direct variation. Sort the equations into the appropriate category. y=3x
Direct Variation
Not Direct Variation
x=-1
y=(217)
-05x=y
y=22x + 7
y = 4

(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 the expression for the given value of the variable 2×(c2-5) for c=4

Given the sequence 7, 14, 28, 56, which expression shown would give the tenth term? a. 7^10 b. 7·2^10 c. 7·2^9