Answer:
b. 8.7
Step-by-step explanation:
Answer:
Step-by-step explanation:
A mixed number is an addition of its whole and fractional parts.
−(1 + 29/40)
Add
1 and 29/40
Write 1 as a fraction with a common denominator.
−(40/40 + 29/40)
Combine the numerators over the common denominator.
−40+29/40
Add 40 and 29
−69/40
The result can be shown in multiple forms.
Exact Form:−69/40
Decimal Form:−1.725
Mixed Number Form:−1 29/40
Answer:
3 question papers
Step-by-step explanation:
If the teacher takes 15 minutes to mark 1 question paper. Then they will probably take 30 minutes to grade 2 question paper. Because 15 minutes+15 minutes=30 minutes. Then if you and another 15 minutes which will be 40 minutes because 15 minutes+15 minutes+15 minutes=40 minutes.
Hence, the teacher will mark 3 question papers in 40 minutes
<u>Given</u>:
The given expression is 
We need to determine how the expression can be simplified.
<u>Simplifying the expression:</u>
Let us determine how the expression can be simplified.
The expression is given by
Applying the exponent rule that 
in the above expression, we get;
Adding the exponents, we get;
Again, applying the exponent rule 
, we get;
Thus, the simplified expression is 
Hence, the expression is simplified by adding the exponents and keep the same base. Then find the reciprocal and change the sign of the exponent.
Therefore, Option D is the correct answer.
