Answer: B and D
Step-by-step explanation:
First, solve the terms inside of the parenthesis. As a general rule, whenever you multiply two terms that have the same base, you can add their exponents.
Applying this rule, the base in the problem is 6, and the exponents are 3 and -4. The sum of 3 and -4 leaves -1. Therefore, this is one of our solutions:

When you have an exponential term raised to another exponent, you can simply multiply the exponents. In the previous solution given above, multiply -1 and -3 to get 3. Therefore our second solution is:

1)Calculate the product:
21a + 10a - 3a
2)Collect like terms:
28a
Answer:
28a
The length of the hypotenuse in inches is 2 square root 13
The answer is 3√5. You use the distance formula: √((x2-x1)^2+(y2-y1)^2)
True, because 4.2 is a lot lower than 55.3, 73.4, 89.3, and 132.2.