**Mathematics 120 ** (Precalculus)

Self Test

prepared by:

Joseph Malkevitch

Mathematics Department

York College (CUNY)

Jamaica, NY 11451

email:

__malkevitch@york.cuny.edu__

web page:

__http://york.cuny.edu/~malk/__

The questions below are designed as a self-test to determine if you are making mistakes with regards to some of the basic skills that are the background for precalculus.

1. Perform the indicated operations and simplify:

a. (3/14) + (7/15) =

b. (7/12)(5/21) =

c. (14/15) divided by (21/35) =

2. Multiply or simplify:

a. (x - 8)(x + 4) =

b. (x - 5)(x - 9) =

c. (x - 9y)^{2} =

d. (x^{7})(x^{4}) =

3. Perform the indicated operations and/or simplify:

a. (3x/5) - (4x/3) =

b. (3x/7)(14x/9) =

c. 2x/5 divided by 15/x^{4}

d.

e.

f. (-3x^{3} + 4x^{2} -9x +5) - (-7x + 3x^{3} + 2x^{2} - 11) =