Use a tree to test whether the following argument is valid or invalid. if it is invalid, read off a counterexample. 1. (aab) v-( c d ) 2. a + (bvd) 3. -d+-(avb) : : a

Perform the required operations on the following functions given: f(x)= 3-x; g(x)= -2x find g[f(x)]

Oliver had $50 on the day before his birthday. after he recived some money for his birthday , he had $75. write and solve eqaution to find how much money oliver received for his birthday. x+50=75

Aband wants to create a cd of their last concert. to creat the cds, the cost will be $350 advertisement fee plus $3 per cd.write an inequality that represents how many cds they can buy with a maximum of $1225.solve the inequality