Skye ran r laps today at soccer practice. nadine ran five fewer laps than skye. if nadine ran eight laps at practice, which of the following equations could be used to find how many laps skye ran?
a. r - 5 = 8
b. r + 5 = 8
c. r = 8 - 5
d. -5r = 8

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

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

english maybe i can ..