For this case we must indicate expressions equivalent to:
We have to:
Rewriting the expression:
To divide powers of the same base, we place the same base and subtract the exponents:
The options are:
A) 
B) 6
C) 
D) 
E) 
F) 
So if we simplify option A) we have:
Option C) we have:
Option E) is
Answer:
Option A, C, E
It will take her 6 weeks.
6 x 22.25= 133.5 + 44.5 = 178
Answer:
2 7/12
Step-by-step explanation:
−512−−93=?
Since the the second fraction is negative and you are subtracting, remove the negative sign and switch the operation to addition.
The equivalent equation is
−512+93=?
The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.
LCD(-5/12, 9/3) = 12
Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.
(−5/12×1/1)+(9/3×4/4)=?
Complete the multiplication and the equation becomes
−5/12+36/12=?
The two fractions now have like denominators so you can subtract the numerators.
Then:
−5+36/12=31/12
This fraction cannot be reduced.
The fraction
31/12
is the same as
31÷12
Convert to a mixed number using
long division for 31 ÷ 12 = 2R7, so
31/12=2 7/12
Therefore:
−5/12−−9/3=2 7/12
