Companies A and B produce phone chargers. Company A makes 15 phone chargers when Company B makes 20 phone chargers. When Company A makes 30 phone chargers, how many phone chargers does Company B make? Write your answers in the blanks.

40

Step-by-step explanation:

Company A makes 15 phone chargers when Company B makes 20 phone chargers.

When Company A makes 30 phone chargers, B makes?

40 chargers

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

b

step-by-step explanation:

if a was wrong then it has to be b it cant be c either because not all the y intercepts are the same!

ok now , i would like brainlest plz