(5 points per question) 2. to which subsets of real numbers does the number -22 belong? choose all that apply. [] whole numbers [] rational numbers [] integers [] irrational numbers [] natural numbers 3. what is an algebraic expression for the following word phrase. "6 times the difference of b and p"? a.) 6b - p b.) 6(b - p) c.) 6 - bp d.) 6bp 4. what is the simplified form of the expression? 5(14 - 2) ^2/2 a.) 60 b.) 30 c.) 72 d.) 360 5. evaluate u + xy, if u = 18, x = 10, and y = 8. a.) 188 b.) 36 c.) 98 d.) 224

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.