Unit Test — Unit test Answers
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What are the values of c and d in the matrix subtraction below?
A
mc009-2.jpg
B
mc009-3.jpg
C
mc009-4.jpg
D
mc009-5.jpg
23
Which of the following sets of data would you likely represent with a square matrix?
A
A shoe salesperson wants to use an augmented matrix to represent the quantity of children’s shoes and adult shoes sold at his store for two days.B
A racquetball club has a tournament where each member plays every other member and represents the scores in a matrix.C
A student wants to write a coefficient matrix representing a linear system with two equations and three unknowns.D
A teacher wants to write an augmented matrix representing a linear system with four equations and four unknowns.24
The mean test scores with standard deviations of four English classes are given below.ClassMeanStandard DeviationMrs. Jones891.9Mrs. Rijo821.4Mr. Phan733.4Mrs. Scott906.1Which statement is most likely to be true?
A
The scores of Mrs. Scott’s class are the closest to the class mean.B
The scores of Mr. Phan’s class are the closest to the class mean.C
The scores of Mrs. Jones’s class are the closest to the class mean.D
The scores of Mrs. Rijo’s class are the closest to the class mean.25
City planners plan to survey residents to estimate the proportion of city residents who use public transportation at least once a week. Which of the following methods describes a voluntary response survey?
A
City planners stand outside an office building and survey workers.B
City planners hand out surveys to parents at a youth soccer game.C
City planners take a random sample of local homes and survey the residents.D
City planners email a survey to all residents in the community.Did you find these answers helpful?
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