It costs $83 a day to rent a car plus a required fee for insurance. Suppose the total cost for renting the car for 7 days is $621. Write an equation to model this math situation. How much does the insurance cost? a
621=83b+7; b= $7.41
b
621=83(7)+b; b= $1
c
621=83(7)+b; b= $40
d
581=621+b; b= -$40

Can (2,3 and square root 10) be sides ona right triangle?

What is the result of adding the system of equations? 2x+y=4 3x-y=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)