Find the sum of the following fractions. Explain how you determined the equivalent fractions and simply the sum. 2/5 + 3/4 =

1 3/20

Explanation:

Find the lowest common denominator of both fractions, which is 20.

2/5 = x/20. Find the value of x and that is 8.

3/4 = y/20. Find the value of y and that is 15

Add 8/20 and 15/20 and that gives you 23/20. This is an improper fraction so divide 23 by 20, which is 1 3/20

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

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.