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Mathematics 81 Online
hiiiihiiiiiiiiii:

Find the lowest common denominator and solve. 3/7 - 4/21 1/21 1/7 0 5/21 I thank its C

hiiiihiiiiiiiiii:

@Five

MrMudd183:

what would be the first thing you would do? we already know a common denominator, what do you think that is?

hiiiihiiiiiiiiii:

u multiply the 2 two numbers

MrMudd183:

Correct, what would you multiply them by to get the common denominator?

hiiiihiiiiiiiiii:

yes

MrMudd183:

You would multiply the left side by 3 to get the common denominator. you don't have to multiply anything to the right side

hiiiihiiiiiiiiii:

ohhh

MrMudd183:

After you do that, what do you think comes next?

hiiiihiiiiiiiiii:

you subtract thn all

ninjabeeler1234:

The choices are E and F

MrMudd183:

Correct hiiii after that you simplify the fraction that you got if it isn't in simplest form

hiiiihiiiiiiiiii:

okay

MrMudd183:

What do you think the answer is?

hiiiihiiiiiiiiii:

C

justus:

Incorrect.

hiiiihiiiiiiiiii:

ohh woops i mean B

MrMudd183:

I think it's D... the fraction you get is already in simplest form

hiiiihiiiiiiiiii:

okkkk

justus:

3*3/7*3-4/21 9/21-4/21 9-4/21 5/21

MrMudd183:

5 and 21 are not factors of each other, so it's already in simplest form

hiiiihiiiiiiiiii:

ooohhhhh

hiiiihiiiiiiiiii:

ty

MrMudd183:

You're welcome :)

justus:

Np.

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