Snorkel and two friends rented three life jackets and a sailboat. the life jackets were $3 each and the boat was $12 an hour. the total cost was $93. for how many hours did they rent the sailboat?
(i need an equation along with the answer.)

The equation is hr= (TC-Pxj*x)/Pxs

They rent the sailboat for 7 hours

Step-by-step explanation:

We have to get the total cost, that will be the price of the jackets multiple by the quantity of person + the price of the rent of the  sailboat multiple by the quantity of hour.

The equation will be:

Total cost= price of the jackets* the quantity of person + the price of the rent of the  sailboat * the quantity of hour.

Price of the jackets=Pxj = $3

The quantity of person= x= 3

The price of the rent of the  sailboat= Pxs=$12

The quantity of hour= hr=?

TC=Pxj*x +Pxs*hr

hr= (TC-Pxj*x)/Pxs

hr=  (93-$3*3)/$12

hr= ($93-$9)/$12

hr= ($84)/$12= 7 hr

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb