Use Cramer's rule to solve the system of linear equations.2.1x + 2.2y = 21.32.2x - 2.0y = 9.4
A. (3, 7)
B. (7, 3)
C. (-7, -3)
D. (-3, 7)
Answer: B
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Answer the question.Which of the following is not an argument against using blinding in an experiment?
A. The experiment involves animals, not people B. The experiment is done on plants, not people C. It would be impossible to conceal from the participants whether they are receiving the treatment or the placebo D. The participants in the experiment don't believe in the placebo effect
Solve the problem. Use 3.14 for ?. Round your answer to the nearest hundredth.The shape of a barbecue pit is like a parallelogram with height of 30 in. and a base of 38 in. It costs $0.80 per ft2 to fill the pit with charcoals. How much totally does it cost?
A. $76.00 B. $6.33 C. $912 D. $25.33
The bar graph below shows the number of students by major in the College of Arts and Sciences. Answer the question.
About how many students are in the College of Arts and Sciences?
A. 1325 B. 1225 C. 1100 D. 1050
Solve the problem.Find a polynomial for the sum of the shaded areas of the figure.
A. ?r2 + 60? B. ?r2 + 4? C. ?r2 - 64? D. ?r2 - 60?