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For the following problem, set up the augmented matrix that describes the situation, and solve for the desired solution.
John has a jarful of quarters and nickels. There are 104 coins in the jar. The value of the coins is $16.60. How many of each type of coin are there?
Graph the inequality and show (shade in) solution region.
1. 2y ‹ -4
2. x+2y ›or equal to 6
3. -2y+4x‹ or equal to 8
Graph the system of inequalities. Show (by shading in) the feasible region.
1. -x-y ‹ 5, x ‹ 2y
2. 3x+y› or equal to 6, x+2y› or equal to 7, x› or equal to 0, y› or equal to 0
If 80% of a radioactive element remains after 250 million years, then what percent remains radioactive after 600 million years? What is it's half life?
find the simplified expression of revenue from the given data.a store has been selling 200 dvd players per week at 450
The scores on a lab test are normally distributed with mean of 200. If the standard deviation is 20, find
Find an equation of the hyperbola having foci at (-12, - 1) and (4, -1) and vertices at (-6, -1) and (-2, -1).
If you wanted to determine whether the class's test grades improved from the midterm to the final exam for stats students, which statistical test would you use?
The Miller family and the Carter family each used their sprinklers last summer. The water output rate for the Miller family's sprinkler was 15 L per hour.
Find the derivative of the function and Find an equation of the tangent line to the curve at the given point.
Suppose a business purchases a new tractor at an original cost of $42,000. Further, suppose this tractor has a useful life of 8 years and a salvage value of $10,000.
90% confidence interval for the difference in average absorption time for the two drugs. Does it appear that one drug is absorbed faster than the other (at the 90% level)? Explain
if we take take a curve z fy in the yz-plane and revolve it about the z-axis we obtain a surface of revolution in
chocolate bars produced by a certain machine are labeled with 8.0 oz. the distribution of the actual weights of these
Maximize z = 3x - 5y Subject to: 4x + y ≤ 12
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