Ronald bought a number of cds for 13$ each. What was the total amount he spent on CDs

What is the value of x in the this question ?

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median amount spent? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28