Question

Please help. 50 points + brainliest

Answer 1

Answer:

1. (a-c)$\sqrt{x}$ + b$\sqrt{y}$

2. 9m + 2$\sqrt{n}$

3. 6a

4. (5a - 3b)$\sqrt{5y}$

Step-by-step explanation:

1. since a and c share the same squareroot x, you can combine these together.

2. First add like terms together. 4m - m + 6m = 9m. Then 5$\sqrt{n}$ and -3$\sqrt{n}$ combined equals 2$\sqrt{n}$

3. First simplify the square roots. squareroot of 16 is 4. square root of 49 is 7. square root of 81 is 9. They are all multiplied by a in the expression. Thus 4a - 7a + 9a = 6a

4. First simplify the radicals, they are not perfect. square root of 125 is equivalent to sqrt(25 * 5), which sqrt of 25 is 5, but we keep the sqrt of 5. For sqrt of 45, it is the same as sqrt9 * sqrt5. sqrt of 9 is the same as 3 and we keep sqrt 5. Thus we get the below:

5a$\sqrt{5y}$ - 3b$\sqrt{5y}$

We can combine the two like terms and get the final answer above.

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