Solve the problem using matrices.Ellen wishes to mix candy worth $2.19 per pound with candy worth $7.87 per pound to form 22 pounds of a mixture worth $6.58 per pound. How many pounds of the more expensive candy should she use?
A. 7 lb
B. 5 lb
C. 17 lb
D. 22 lb
Answer: C
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Provide an appropriate response.Are the points A(3, 6), B(6, 9), C( 8, 1), and D(11, 4) the vertices of a parallelogram (opposite sides equal in length)? of a rhombus (all sides equal in length)?
A. no; no B. no; yes C. yes; yes D. yes; no
Rewrite the given expression using exponential notation.(-7) ? (-7) ? (-7) ? (-7)
A. -74 B. (-7)4 C. 28 D. 4-7
Simplify the expression using the order of operations. Write the answer as an improper fraction where appropriate.
A. 49
B. 
C. 41
D. 10
Solve the problem.Joytown has a present population of 40,000 and the population is increasing by 2.5% each year. How long will it take for the population to double? Round your answer to the nearest year.
A. 40 years B. 28 years C. 29 years D. 41 years