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3 years ago

11/15 + -2/5 what is the answer in fraction form

Mathematics

2 answers:

Sedaia [141]3 years ago

4 0

1/3 would be your answer
you have to find the LCD than combine

zysi [14]3 years ago

3 0

Since we're adding fractions we'll need to make the denominator the same

5 fits into 15 three times

so we'll need to multiply both the numerator and denominator of -2/5 by 3

-2/5 becomes -6/15

now we can solve

11/15 + -6/15 = 5/15

5/15 can be written as 1/3 in simplified form

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Step-by-step explanation:

Since we have a total of 8 locations ( 4 to the new ointment and 4 to the control) , each one can be chosen and since the order of the locations that are chosen for the new ointment is not relevant , then we know that the number of choices is given by the number of combinations of 4 elements in 8

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