2,198 Answered Questions for the topic Pre Calculus

Pre Calculus

02/06/16

Please help me on this
A sugar cookie recipe calls for 3 cups of flour for every 2 cups of surgar. If y is the number of cups of flour and x is the number of cups of surgar. Write a formula to determine the number of... more
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Pre Calculus

02/06/16

Please help me on this one
A word processor determines the width of the body of text on a page. If the page is originally 5 inches wide and has two equal size margins of x inches of each side of the text , write formula... more
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Pre Calculus

01/29/16

Determine whether a baseball hit 4ft above ground at 115ft per second at an angle of 25 degrees relative to level ground will clear a 10-foot wall 310 ft away.
I need help with the steps and answer 
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Pre Calculus

01/28/16

F (x)=2x+7
Find the inverse of function.
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Pre Calculus

01/19/16

A tightrope walker is 8 feet away from one end of the rope. If he takes 2 steps at 9 inches long per step, how far is he from the same end of the rope?
i know there are two possible answers. 
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01/13/16

Graphing Trig Functions & Inverses
Determine the Amplitude: f(x) = 5 sin (4x) a. 5 b. pi/5 c. 4 d. pi/4   Determine The Period: f(x) = -2cos(2x-90) a. 180 b.45 c. 4 d. pi/4   what is the horizontal shift for the graph of:... more
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Pre Calculus

01/12/16

Prove the identity cot^2x - cos^2x= cos^2x - cot ^2x
Pre calculus 
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Pre Calculus Algebra College Algebra

01/11/16

Need help with math question?
One box of Swiss Miss Cocoa Mix weighs 0.385 kg, but 39 grams of this weight is the packaging. Find the actual weight of the cocoa in 8 boxes.
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Pre Calculus Algebra College Algebra

01/11/16

Need help with math question?
The Shop 'n Bag supermarket chain ships hamburger meat by placing 10 packages of hamburger in a box, with each package weighing 3 lb 4 oz. How much will 4 boxes of hamburger weigh?
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Pre Calculus

01/11/16

show that(tanx)/(1-cotx) + (cotx)/(1-tanx) = 1 + secxcscx
pre calculus
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Pre Calculus

01/11/16

show that(sinx - cosx)/(sinx+cosx) = (2sin^2x-1)/(1 + 2sinxcosx)
pre calculus
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Pre Calculus Pre Calculus Honors

01/11/16

show that tanx/(secx-1) = (secx+1)/tanx
pre calculus
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Pre Calculus

01/05/16

Write the equation of a line in slope intercept form with the given information
passing through the points (-3,7) and (4,9)
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Pre Calculus

01/03/16

Standard form of parabola of y= -2x^2-4x-5
Asking for the starndard form of the parabola 
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Pre Calculus

12/20/15

How do I convert the rectangular equation 3x-y+2=0 to polar form?
I don't understand the steps to get it into polar form.
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Pre Calculus

12/16/15

Find all values of ? in the interval [0°, 360°) that satisfy the equation. Use degree measure 3 sin ( ?) = cos ( ?)
The solution set is {-- --}. (Round to the nearest tenth as needed and use a comma to separate answers as needed)
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Pre Calculus

12/16/15

Find the approximate solution to the equation by graphing an appropriate function on a graphing calculator.
x² = 1.9x x≈( Round to three decimal places as needed. Use a comma to separate answers as needed)
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Pre Calculus Word Problem Math Help

12/16/15

Pre Calculus word problem
Suppose 14 men and 24 women apply for jobs. If four people are selected randomly to fill job positions, what is the probability only one man was selected for a job?
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Pre Calculus

12/16/15

s=t^2-8t, how long to the nearest tenth of a second will it take to make 6 feet
s=t2-8t
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Pre Calculus Precalculus Word Problems

12/15/15

A jar contains Jelly-Beans, and there are 87 pink, 74 purple, 35 white, 70 black, 25 orange, and 47 green. If two Jelly-Beans are chosen from the jar, what is t
I have a feeling that you should add all of the beans together and divide by 2, but I'm not sure that is correct???  Full question: A jar contains Jelly-Beans, and there are 87 pink, 74 purple, 35... more
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Pre Calculus Word Problems Math Help

12/15/15

In a shipment of 2,500 video games, 97 are defective. If a person buys two games, what is the probability that both are defective? Round to the nearest thousan
In a shipment of 2,500 video games, 97 are defective. If a person buys two games, what is the probability that both are defective? Round to the nearest thousandths.
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Pre Calculus

12/09/15

Solve equation
4z^3-8z^2=0
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Pre Calculus

12/06/15

A radiator has 6qts of fluid. 40% is antifreeze. How much fluid should be drained and replaced with pure antifreeze so it is 60% antifreeze?
I have no idea how to start or answer this problem. 
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Pre Calculus

12/06/15

If you are standing on a 160ft high cliff, how far has the rock traveled after two seconds if you throw it down at an initial velocity of 30ft/sec
I know you have to use h=-16t^2+v(0)t+h(0). 
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Pre Calculus

12/06/15

You are standing on a cliff that is 160 ft high. How long will it take a rock to hit the ground if you throw it downward at an initial velocity of 30ft per sec?
I know you have to use h=-16t^2+v(0)t+h(0). And I also know that when you just drop it off of the cliff, it takes 3.16 seconds.
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