I believe the two fractions are the numbers they all have in common.
Answer:
Gabriella has $7 in change.
Step-by-step explanation:
First minus $13 from $20.
Then get $7 left over.
Finally $7 is your awnser.
Answer:

Step-by-step explanation:
Given:

Required
Equivalent expression without fraction
To do this, we simply multiply through by a common multiple of the denominators in the expression.
The denominators are 2 and 3


So, 6 is the least common multiple.
Multiply both sides by 6




<em>Hence, an equivalent expression.</em>
Answer:
C) 21
Step-by-step explanation:
a² + 20² = 29² Use Pythagorean Theorem to solve for a
a² + 400 = 841 Solve for the exponents
- 400 - 400 Subtract 400 from both sides
a² = 441 Take the square root of both sides
a = 21