this is addition with fractions and variables
2006-06-29 09:41:55 · 5 answers · asked by alex 1 in Science & Mathematics ➔ Mathematics
You need to get a common denominator. Let's choose 3d. To make the first fraction have that denominator, multiply by 3/3 to get 21/3d. To make the second fraction have it, multiply by d/d to get 2(d^2)/3d. Now you can add the numerators and get
(21+2d^2)/3d.
You cannot reduce any farther because 21 and 2dsquared share no common terms. (21 = 3*7 and 2d^2= 2*d*d).
2006-06-29 09:48:26 · answer #1 · answered by I eat apples 2 · 0⤊ 0⤋
First step is to get a common denominator. The common denominator here is 3d.
The numerator will be 7(3) + 2d(d) = 21+2d^2.
Thus your answer is (21+2d^2)/(3d)
2006-06-29 16:48:11 · answer #2 · answered by Jeff U 4 · 0⤊ 0⤋
The common denominator of both fractions is 3d. Previous answers ok.
2006-06-29 16:47:58 · answer #3 · answered by J_humor 2 · 0⤊ 0⤋
7/d +2d/3 = (21+2d^2)/3d
2006-06-29 16:45:21 · answer #4 · answered by N M 1 · 0⤊ 0⤋
(7/d) + ((2d)/3)
Multiply everything by 3d
(21 + 2d^2)/(3d)
2006-06-30 07:10:41 · answer #5 · answered by Sherman81 6 · 0⤊ 0⤋