Sandra took 4 tests in math and her mean score was 18. I she scored 18, 22, and
1 answer:
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Answer:
B: 8 7/8 Lbs
Step-by-step explanation:
answer =
step 1 find a common denominator
common denominator - 8
* apply *
now we have
step 2 make each fraction a improper fraction
We can do this my multiplying the big number by the denominator and adding that to the numerator.
now we have
Now we can subtract
remember when subtracting fractions you only subtract the numerators. ( so we keep the denominator as 8 )
so 121 - 28 - 22 = 71
so the answer is
finally we want to change the answer back into a mixed fraction
To do this we divided 71 and 8
8 can go into 71 8 times
8 * 8 = 64
71 - 64 = 7
We're left with