3 years ago

Work out a) 2/7+3/7 b) 5/8+7/8 c) 2/3-1/2

Mathematics

2 answers:

Alex_Xolod [135]3 years ago

7 0

Answer:

a) 5/7 b) 12/8, 1 4/8

Step-by-step explanation:

max2010maxim [7]3 years ago

6 0

Answer:

a) 5/7

b) 2/3

c) 1/6

Step-by-step explanation:

a) 2/7 + 3/7

since the denominators are both 7 we use 7 as the LCM ( lowest common multiple)

2+3/7 = 5/7

b) 5+7/8 = 12/8. 4 can go into both numbers so it gives 3/2

c) 2/3 - 1/2 multiply the denominator since they are different (3×2) =6

4-3/6 = 1/6

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Answer:

The first one is equivalent [the 6x+48 = 2(3x+24)] and the second one is NOT equivalent [the 7x+21 ≠ 2(5x+3)]

Step-by-step explanation:

Just follow distributive property to solve these. You can ignore the first expression in both until you have to compare the answers.

1. 6x+48 and 2(3x+24)

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Bring in the first expression ~ 6x+48 and 6x+48

They are the same, so they are equivalent

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Bring in the first expression ~ 7x+21 and 10x + 6

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