Question: Question 1 Solve: x - 4y = 8 2x + 2y = 1 Question 2 A student was given the following question to solve: (3Y

Question 1

Solve:

x - 4y = 8
2x + 2y = 1

Question 2

A student was given the following question to solve:

√(3Y + 5) = 7C; make Y the subject of the formula.

The student gave the solution as:

[√(3Y + 5)]2 = 7C2

3Y + 5 = 7C2

3Y = 7C2 + 5

Y = 7C² + 5
3

Do you think any error/s was/were made by the student?
If no, give reason/s to support your answer.
If yes, identify the error/s and provide the correct solution for the student.

Question 3

Find the exact value of x:

5x - 3 - x - 1 = 8 + 7x
2 4

Question 4

Marcia inherited $3, 750 from her father's estate. After investing her inheritance in a bank for 4 years, it accumulated to $4, 998. What was the interest rate that the bank paid on Marcia's investment?

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