The scores on a 30-point multiple-choice exam are given in the following frequency table:
What is the median score on the exam?
A. 26.5
B. 25
C. 25.5
D. 26
Answer: A
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Which learning problem is most likely to occur if students internalize the "fruit salad" approach to simplifying expressions?
a. Students will tend to cojoin terms in an expression like 3x + 4 = 7x b. Students will simplify an expression like 2m + 3 to 5m c. Students will believe that (2x)(4y) does not equal 8xy because 2x and 4y are not like terms d. Students will not be able to graph the equation y = 2x + 3 without the assistance of a graphing calculator
Simplify the expression.(-2z2)(4z3)
A. 256z5 B. -8z6 C. -8z5 D. 8z6
Provide an appropriate response.A student is solving the equation x2 = 8x This student has decided to divide both sides of the equation by x and finds the solution x = 8. The student checks the answer in the back of the book and finds that x = 0 is also a solution. The student feels that this is a misprint. How would you advise him or her?
What will be an ideal response?
Factor completely, or state that the polynomial is prime. Assume any variable exponents represent whole numbers.2a3c2 - 162ax2y2
A. 2a(ac + 81xy)(ac - 81xy) B. 2a(c + 9xy)(c - 9xy) C. 2a(ac + 9xy)(ac - 9xy) D. prime