Thread: where I went wrong

I did poorly on my last test and would like to know where, these are the questions I got wrong:

1. Simplify: -16ab¯²
8a¯³b

2. Subtract: (2x³ - 7x² + 5x) – (6x³ + 2x² - 5x)

3. Simplify: x² + 3x – 4
x² + x – 12

4. Solve: 3(v – 4) -2 = 6(v + 3)

5. Solve: 2x + 7 < 3 – 2(x + 1)

6. Find the equation of the line that contains the point (2, -5) and has slope ¼.

7. Let f = 3x – 1 and g(x) = X³ - 3x find (f – g)(2).

8. Find the inverse of the function. If the function does not have an inverse function, write “no inverse function)”. (6, 9), 7, -4), (5, 1), (1, 5)

9. Present Value: Mike Brone is planning on purchasing a new car in 2 years and wants to have $4500 for a down payment. How much money must he deposit today into an account that earns a 6.5% interest rate, compounded quarterly, to reach his goal?

Please show your working.

Originally Posted by grmamatina

I did poorly on my last test and would like to know where, these are the questions I got wrong:

1. Simplify: -16ab¯²
8a¯³b

2. Subtract: (2x³ - 7x² + 5x) – (6x³ + 2x² - 5x)

3. Simplify: x² + 3x – 4
x² + x – 12

4. Solve: 3(v – 4) -2 = 6(v + 3)

5. Solve: 2x + 7 < 3 – 2(x + 1)

6. Find the equation of the line that contains the point (2, -5) and has slope ¼.

7. Let f = 3x – 1 and g(x) = X³ - 3x find (f – g)(2).

8. Find the inverse of the function. If the function does not have an inverse function, write “no inverse function)”. (6, 9), 7, -4), (5, 1), (1, 5)

9. Present Value: Mike Brone is planning on purchasing a new car in 2 years and wants to have $4500 for a down payment. How much money must he deposit today into an account that earns a 6.5% interest rate, compounded quarterly, to reach his goal?

this my check see and check it.