An online retailer adds £3 post and packing each order. Write a formula for the total cost C for an order of £x
Work out the value of the order £x when the total cost is £36.50.

Solutions for 2x+7 less than or equal to 3x-5

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)