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Alex and Jamie work for a landscape company during the spring and summer. When Alex works alone, it takes him 5 hours to complete a spring clean-up in a yard. When Alex and Jamie work together, it takes them 3 hours to complete a yard.
a. Define a variable to represent the time it takes Jamie to complete a yard alone.
b. Write an equation to represent the time it takes Alex and Jamie to complete a yard together.
c. Solve the equation to determine the time it takes Jamie to complete a yard alone.
Probability of guessing four correct out 20 multiple choices, If a student randomly guesses at 20 multiple-choice questions, what is the probability that the student gets exactly four correct?
Find the volume of the solid generated by the region in the second quadrant bounded above by the curve y=-x^3, below the by the x-axis, and on the left by the line x=-1 about the line x=-2
Write equations for the vertical and the horizontal lines passing through the point (-7,5) in (x,y)-coordinates.
Determining the dimensions of a rectangle of maximum area that is formed by x- axis and a semi circle - What length and width should the rectangle have so that its area is a maximum?
Collina's Italian Café in Houston, Texas, advertises that carryout orders take about 25 minutes (Collina's website, February 27, 2008). Assume that the time required for a carryout order to be ready for customer pickup has an exponential distr..
Prove that if a series of complex numbers sum (c_n) converges to s, then sum (c_n) is Cesaro summable to s.
a woman 6ft tall walks away from a light 10 ft above the ground. if her shadow lengthens at the rate of 2ft per sec, how fast is she walking?
Bayside insurance offers two plans.under plan A G would have to pay the first $70 of her medical bills plus40% of the rest. under plan b G would pay the first $240 but only 35% of the rest
Find an 85 percent confidence interval
An upright cylindrical tank with radius 5 m is being filled with water at a rate of 3 m3/min. How fast is the height of the water increasing? (Round the answer to four decimal places.)
Evaluate the name of each pet's owner, the name and animal type of each pet, the street each owner lives on and the number of days that Larry needs to care for the animals for each owner
A New York Times editorial criticized a chart caption that described a dental rinse as one that "reduces plaque on teeth by over 300%." What is wrong with that statement?
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