The sum of the first and 11th terms of an arithmetic sequence is 40, a) what is the sum of its 5th and 7th terms ? b) What is its 6th term? c) what is the sum of the first 11 terms of the sequence ?

Complete the table for different values of x in the polynomial expression -7x2 + 32x + 240. then, determine the optimal price that the taco truck should sell its tacos for. assume whole dollar amounts for the tacos.

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?