Aaron and rachel can clear the weeds out of their vegetable garden 2 hours if they work together. if aaron works alone, it will take him 5 hours. the year before that, kara painted it by herself and it took 12 hours longer. how long did it take kara to paint the fence?
a. 12 hours
b. 24 hours
c. 20 hours
d. 8 hours

13875138answer:

step-by-step explanation:

use a calculator!

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

3, 12, 48, 384, 1536, 6144, 24576, 98304

step-by-step explanation:

just keep timing it by 4.