Central Tendency
Which of the following is not a measure of central tendency?
A. Mean
B. Mode
C. Median
D. Range
D. Range
Which of the following is a polynomial?
See Attachment #1
B
What is the simplified form of (a + b)2?
a2 + 2ab + b2
What is a rational algebraic expression?
A. An expression containing only whole numbers
B. An expression involving square roots of variables
C. A ratio of two polynomials
D. A sum of constants and variables
C. A ratio of two polynomials
What is the common difference in an arithmetic sequence?
A. The ratio between two consecutive terms
B. The number of terms in the sequence
C. The fixed amount added to each term to get the next
D. The average of the first and last terms
C. The fixed amount added to each term to get the next
What measure of Central Tendency is represented by the middle number if the data are arranged in order?
Median
What happens when you add two polynomials?
A. Only the coefficients are multiplied
B. The degrees of the polynomials are added
C. Like terms are combined by adding their coefficients
D. The terms are subtracted directly
C.
What does the expression (x+5)(x−5)represent?
Difference of two squares
Why must you check for common factors before simplifying a rational expression?
A. To make the expression longer
B. To convert it into a decimal
C. To eliminate terms and reduce the expression to its simplest form
D. To change the variable
C. To eliminate terms and reduce the expression to its simplest form
Which of the following sequences is an arithmetic sequence?
A. 3, 6, 12, 24
B. 2, 5, 8, 11
C. 1, 4, 9, 16
D. 5, 10, 20, 40
B. 2, 5, 8, 11
Find the mean of the following numbers: 7, 5, 3, 8, 7.
6
Simplify Attachment #2
3x2+x+5
Factor the expression: x2 + 6x + 9
(x + 3) (x + 3)
Simplify attachment #5
x+3 / x + 2
Find the 10th term of the arithmetic sequence: 4, 7, 10, 13, ...
31
iven the data set: 4, 8, 8, 6, 5, 10, 7
Which measure of central tendency is affected the most by the value 10?
Mean
Which expression is the correct result of multiplying (x+2)(x−3)?
x2 - x - 6
Which of the following expressions is not factorable using special products?
See attachment #4
x^2 + 25
Simplify x2 - 1 / x + 1
x - 1
Given that the 5th term of an arithmetic sequence is 18 and the 10th term is 33, what is the common difference?
3
A teacher wants to summarize the performance of a class where most students scored the same mark, but a few scored very high or very low. Which measure should the teacher use and why?
A. Mean, because it includes all values
B. Mode, because it shows the most common score
C. Median, because it eliminates the effect of outliers
D. Range, because it shows the spread
Median, because it eliminates the effect of outliers
See attachment #3
A. They forgot to subtract the second polynomial correctly
B. They combined like terms correctly
C. They multiplied instead of subtracting
D. They factored the expression instead of simplifying
A
Find the right factor of x^2 - 10x + 25
(x - 5) (x - 5)
A student simplified x2 +4x + 4 / x + 2 as x2 + 2. Is he correct?
No, it has to be x + 2
A student claims the 20th term of the sequence 10, 15, 20, 25, ... is 115. Is the student correct?
No, the correct 20th term is 105