Answer as soon as possible, worth 74 points. three relations are described algebraically, in each, x represents an input (the independent variable) and y represents the output (the dependent variable.) decide whether each is a function or is not a function. explain why or why not. 1 -3x+8=y 2 y=x^2+3 3 y^2=x

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

Joel wants to buy a new tablet computer fram a store having a 20% off sale on all tablets. the tablet he wants has an original cost of $190. he also wants to make sure he has enough money to pay the 5% sales tax. part one joel uses the incorect expression 0.95(190)(0.8) to calculate that the tablet will cost him a total of $144.40. describe his error and write the correct expression part two how much will joel pay for the tablet show your work if you answer this question correctly you will receive a prize of 99 points good luck