3,283 Answered Questions for the topic College Algebra

College Algebra

7d

#### college algebra word problem

Express the description of a sum using summation notation.The sum from n = 0 to n = 9 of 7n

College Algebra

7d

#### The length of a rectangle is four more than double the width. If the perimeter is 122 inches, find the dimensions.

find the dimensions.for both width and length

#### Draw a square with sides of 2 units and lower left vertex at point A (3,2).

Draw a square with sides of 2 units and lower left vertex at point A (3,2). What will the coordinates of the upper right vertex be? Rotate the figure 90 degrees counterclockwise about point A and...
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#### Mrs. Dellamorte starts a side-business selling her mixtape. She makes a weekly profit by selling 'x' mixtapes according to the equation p(x)=-0.5x²+40x-300

How many mixtapes does she need to sell each week to maximize her profit? Don't forget to use units.

8d

#### arithmetic and composition (please help ive tried everything!)

The cost to manufacture a product is proportional to the quantity produced, with a cost of $5000 dollars per day when 100 items are produced. The cost to store n items is proportional to the...
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#### What is the average difference in the air pressure between the top and bottom of the wing?

The wing of an airplane has an average cross-sectional area of 11 m2 and experiences a lift force of 72,000 N. What is the average difference in the air pressure between the top and bottom of the...
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#### Compute the speed of the air flowing into the room (in ft/s), assuming that we can treat the air as an incompressible fluid.

Air flows through a heating duct with a square cross-section with 6-inch sides at a speed of 5.9 ft/s. Just before reaching an outlet in the floor of a room, the duct widens to assume a square...
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#### How much soybean oil must the bowl displace in order to float?

A metal bowl with a weight of 1.25 N is placed in a larger kitchen container filled with soybean oil. How much soybean oil must the bowl displace in order to float? For reference, the mass density...
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College Algebra

9d

#### Graphing functions

Graph the function f(x)=x after it has been vertically shifted 4 units.

College Algebra

9d

#### Graphs of linear functions

Give the equation of the line passing through the point (12,−22) that is perpendicular to y=6/7x+1.Write your answer in slope- intercept form.

College Algebra

9d

#### college algebra word problem

A cell phone factory has a cost of production C(x) = 150x + 40,000 and a revenue function R(x) = 400x. What is the break-even point?

College Algebra

9d

#### college algebra word problem

Use a system of linear equations with two variables and two equations to solve.If an investor invests a total of $40,000 into two bonds, one that pays 4% simple interest, and the other that pays 3...
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College Algebra

9d

#### college algebra word problem

A plane traveling with the wind travels 700 miles in 5 hours. The return trip is against the wind and takes 7 hours. Find the rate of the plane in still air and the rate of the wind.

College Algebra

9d

#### college algebra word problem

In one day, a book store earned $239 in sales for 4 copies of a new cookbook and 5 copies of a new science fiction novel. On the next day, it earned $182 in sales for 3 copies of the cookbook and 4...
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College Algebra

9d

#### college algebra word problem

Two angles are supplementary. The measure of one angle is 42° more than twice the measure of the other angle. Find the measure of each angle. (Enter your answers as a comma-separated list. Use the...
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College Algebra

9d

#### How many liters of pure water should be mixed with a 8-L solution of 90% acid to produce a mixture that is 90% water?

The answer has to be as a integer or as a decimal.

10d

#### If sinA= -5/13 with angle A in quadrant 3, and cosB= -8/17 with angle B in quadrant 2, then find

sin (a-b)
cos (a+b)

#### Math problem algebra

Stephen wants to build a rectangular enclosure for his animals. One side of the pen will be against the barn, so he needs no fence on that side. The other three sides will be enclosed with wire...
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#### A radioactive element decays according to a continuous exponential decay model...

The half-life of the element is 570 years. If 75 grams is present now, how much will be present in 355 years? (Round your answer to three decimal places.)

College Algebra Math

10d

#### Math problem speed and height

A person standing close to the edge on top of a 108-foot building throws a ball vertically upward. The quadratic function h=−16t2+132t+108 models the ball's height above the ground, h, in...
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College Algebra Polynomials

10d

#### The polynomial of degree 5, P (x) , has leading coefficient 1, has roots of multiplicity 2 at x = 3 and x = 0, and a root of multiplicity 1 at x = − 5 .

Find a possible formula for P(x).P(x) =

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