18 Heather and Adam both solve the same problem 2(3r-6) = 10r - 10. Which one of them is correct?
Adam
2(3r-6) = 10r - 10
6r - 12 = 10r - 10
-12 = 4r - 10
-2 = 4r
1
r=-
2
Heather
2(3r -6 ) = 10r – 10
6r - 6 = 10r - 10
-6 = 4r -10
4 = 4r
r = 1

a) 0.25x times 3. (could be wrong on equation.)

b) 2.25 pound of dark chocolate. (can i eat all the chocolate? plz? anyway, again, could be wrong, but i hope im right. all the chocolate together should be 5.25 pounds)

have a good day!

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

(f+g)(x) = 3^x+10x+4x-2

      =3^x +14x-2

choice b

answer: the answer to this problem is 2x and 2-x both have x as well as 2

step-by-step explanation: first you have to see what is the closest thing they have similar second you note it example 4x and 4+x they both have x and 4