2,208 Answered Questions for the topic Pre Calculus

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?
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
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
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.
Pre Calculus

12/09/15

Solve equation

4z^3-8z^2=0
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. 
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). 
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.
Pre Calculus

12/06/15

If you are standing on a 160 ft high cliff and you drop the rock, how high is the rock after 2 seconds?

I know you have to use h=-16t^2+v(0)t+h(0) but I'm just not sure how to set it up.
Pre Calculus

12/06/15

If you are standing on a cliff that is 160 ft high, how long will it take a rock to hit the ground if you drop it?

I know we need to use h=-16t^2+v(0)t+h(0). But I'm not exactly sure how to put it into the equation properly
Pre Calculus

12/06/15

A rectangular garden is 12ft by 8ft. The same length is added around the whole garden. The new area is 212ft. How much was added to each side?

 know that x has been added to each side and it is the same amour. We need to find x.
Pre Calculus

12/06/15

A boat is taking a 144 mile round trip. (72 miles each way). Traveling with the current, it is 3 hours,against it is 4.5 hours. If it is going 20 mph

I did not get to finish my question because it is so long, but I need to know how fast the current is. 
Pre Calculus

12/06/15

A rectangle is four times as long as it is wide. If it has an area of 36 square inches, what are the dimensions?

I have no clue how to start or solve this problem.
Pre Calculus

12/06/15

The difference of two numbers is 7. The difference of their squares is 259. What are the two numbers?

i know that x-y=7 and I know that x^2-y^2=259. I'm just not sure how to fully solve.
Pre Calculus

12/02/15

a wire length x is bent into the shape of a square. express the perimeter of the square as a function of x

i am very confused on this. please help i have a quiz tomorrow and I will fail :(
Pre Calculus Asymptotes

12/02/15

4(x+1)/ x(x-1) find asymptote

Find the asymptote Of the follwoing problem and label it 
Pre Calculus

11/30/15

Radium-221 has a half life of 30 sec. How long will it take for 85% of a sample to decay?

I have tried to figure this question out and still cant get it right.

11/29/15

Please help me with these identity proofs!!

1) (cscx + cotx) / (tanx + sinx) = cotxcscx   2) (1/secx) -secx = -sinx   3) (1-tan^2x / 1-cot^2x) = -tan^2x
Pre Calculus

11/29/15

Write the equation in standard form for the ellipse

with foci ( - 18,17) and ( - 4,17) and co-vertices - 11,17+ 51 and - 11,17– 51

11/24/15

cos(11pi/12) using Sum and difference identities

could someone explain finding cos(11pi/12) using Sum and difference Identities. it must use one of... more
Pre Calculus

11/23/15

Solve the word problems by writting it down as a system of equations and as a matrix.

1)      To raise money a group of three friends is each trying to sell 100 candles each friend has a package containing the same number of tapers votives and tealights the tapers sell for $6.00... more
Pre Calculus Trigonometry

11/22/15

Tricky trig

What is the horizontal component of a vector having a magnitude of 80 units and a heading of N40 (degrees) W?

11/22/15

How to deal with trigonometry in application?

A utility pole is anchored to level ground by two 53 ft wires, one on each side of the pole. The wires make a 65 (degree) angle with the ground below. How far apart along the ground are the wires?
Pre Calculus

11/19/15

What single transformation of f(x) will result in the graph of g(x)?

f(x)=4x  while g(x)=3(4)(x-2)
Pre Calculus

11/04/15

Given Y 3 = and if Y = 2 when T = 6 and x = 2 , then find Y when x = 9 and T = 36.

Given Y 3 = and if Y = 2 when T = 6 and x = 2 , then find Y when x = 9 and T = 36.

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