Simplify: 4x3 – 3x2 + x + 3x3 choice of answers a. 7x3– 3x2+ x b. 5y3 c. 4x3– 3x2+ x + 3x3 (the expression cannot be simplified) d. 7x6– 3x2+ x

Asupermarket is testing brands of microwave popcorn. for each brand, they recorded the percentage of corn kernels in a package that popped in the recommended cooking time. let a be the data set of percentages listed below. a = {91, 94, 89, 93, 87, 92, 86, 87, 92, 91} the supermarket then realized they missed a brand. when the new brand was cooked, only 74% of its kernels popped. let b be the data set of percentages for all 11 packages, including the package where the least kernels popped. select the statements that are true.