Profit, P(x), is the difference between revenue, R(x), and cost, C(x), so P(x) = R(x) – C(x). Which expression represents P(x), if R(x) = 2x4 – 3x3 + 2x 1 and Cx) = x4 – x2 + 2x + 3?
x4 – 3x3 + x2 – 4
3x4 – 3x3 – x2 + 4x + 2
x4 – 3x3 – x2 + 4x + 2
2x8 – 3x3 + x2 – 4 .

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.