What is x if:
a) 4x−4(x+1)=4
b) 4x−4(x+1)= negative 4

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.