Convert these unlike fractions to equivalent like fractions and add them. You must use the LCD to get the answer correct. If possible, reduce the final sum.

1/7= ?
3/14 =?
1/7 +3/14= ?
1/5=?
2/3= ?
1/5+2/3=?
1/4=?
5/12=?
1/4+5/12=?

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

answer: 2 and 1

step-by-step explanation: got this question

answer: the answer is e

step-by-step explanation:

it's d

step-by-step explanation: