# Pre- Calculus

21,305 results, page 45

### Pre Calc

The symbol nCr, rea "n choose r" or "the number of combinations of n things taken r at a time" is the number: n! ----- r!(n-r)! a:find 4C1 b:Find 5C0 and 5C5 c: Find 7C1, 7C2, 7C3

### Pre algebra

Electrical poles that carry electrical wire seem to get smaller the farther away they are. Find the apparent height of each pole if the tallest pole is 50 ft tall and there is 100 ft between each pole.

### geometry

First of all let me apologize if this is the wrong section; this is a review question from a Calculus III class, but it doesn't involve any actual calculus so I posted it here. If I have a sphere with center (2,-10,4) and radius 10 what is: the intersection with the yz plane? ...

### 6th grade pre-ap LA

We are writeing a letter to seniors in a retirement home. these people have no familey and no friends. what would be an apropitate way to adress the letter if it is personal but we don't know them? It can not be dear resident or dear friend or anything like that

### Pre-Algebra [repost]

This is a realllyy tricky problem and I can't find two more solutions to the equation...someone please help! Find three ordered pairs for the given equation: 4x - 3y = 6 I got one: (3,2) I need help on this ASAP!! Thankss -MC

### Math (Algebra/Pre-Algebra)

Ms. Caswell deposits $450 into an account earning 8% interest per year. How much simple interest is earned after 4 years? Please explain.. I'm supposed to show work =] thank you!

### Pre-Cal(please check)

I have to find the width of a river which is represented by a right trianle. The opposite side is labeled w and the adjacent side is 1oo ft. Theta is 54 degrees. Would my equation be opp = adjacent/cos(54)?

### pre cal

Use synthetic division to show that x is a solution of the third-degree polynomial equation, and use the result to factor the polynomial completely. List all the real zeros of the function. x^3 - 28x - 48 = 0 Value of x = -4 Please help!!Thank you

### Math (Pre-cal)

I can't seem to figure this out. A ship leaves at noon and travels due West at 20 knots. At 2:00 it changes to N54°W...Find the bearing and the distance FROM port at 3:00 pm. I've looked at this program for a while but can't figure it out.

### Pre Calc

Find the work done by a force F of 30 pounds acting in the direction (2,3) in moving an object 3 feet from (0,0) to the point in the first quadrant along the line y = (1/2)x. The answer is 85.38 foot-pounds. I just need to figure out how to get the answer.

### pre-algebra

Solve the problem. Please show all of your work. A driveway rises 11 feet over a horizontal distance of 112 feet. Find the slope of the driveway. Round your answer to two decimal places.

### Pre-Calc

The concentration C of a chemical in the bloodstream t hours after injection into muscle tissue is C=3t^2+t/ t^3+50 A. Determine the horizontal asymptote of the function and interpret its meaning in the context of the problem. B. approximate the time when the bloodstream ...

### EASY Pre-Algebra

In the following situation, determine whether you are asked to determine the number of permutations or combinations. Then do the calculation. How many ways can the four offices of chairman, vice chairman, secretary, and treasurer be filled from a club with 28 members?

### pre algebra 8th grade(0, 0.3), (1, 0.5), (2, 0.7),

how would I graph a slope of 0.2 and a y intercept of 0.3? I know that y intercept is up and down, and the slope is rise (up)over run (across) , but I am confused because of the decimal format. Thank you, I asked mom but she doesn't know either, and I couldn't find examples in...

### Math (Semicircle)(Pre-calc)

goo.gl/photos/e6Ks3v4Qqj177Nun6 The graph below is made from two semicircles. The domain of the function in the graph is [−8,8] [-8,8] . Find a piecewise formula for the function f(x) f(x). Help please, I already on my last attempt and any help is greatly appreciated!

### Calculus-Steve

Find the area of the region between the graphs of f(x)=3x+8 and g(x)=x^2 + 2x+2 over [0,2]. I got 34/3. Calculus - Steve ∫[0,2] (x^2+2x+2) dx = 1/3 x^3 + x^2 + 2x [0,2] = 8/3 + 4 + 4 = 32/3 Why are you taking the antiderivative of x^2 +2x+2 when we are trying to find the...

### Pre-Calc

1.) Find (f + g)(x) when f(x) = x + 2 and g(x) = x - 2. 2.) Find (f - g)(x) if f(x) = 2x - 5 and g(x) = 4. 3.) Given f(x) = 4 and g(x) = 2x - 1, find (f - g)(x).

### Pre Cal

Vertify the identities, clearly show each step (vertify one side that they are equal to each other) sec^2+csc^2=sec^2+csc^2

### Pre Cal

Vertify the identities, clearly show each step (vertify one side that they are equal to each other) sec^2+csc^2=sec^2+csc^2

### Pre-Cal

log base2 5 square root of 512 use the definition of b^1/n log base2 512^1/5 Not quite sure what to do after this Simplfiy.

### Pre-Cal

verify the identity sin x(1 - 2 cos^2 x + cos^4 x) = sin^5 x 1-2cos^2 x looks like 2cos^2x-1 its just backwards. I am not sure where to start.

### pre-calc

A ferris wheel is 28 meters in diameter and makes one revolution every 10 minutes. For how many minutes of any revolution will your seat be above 21 meters?

### Pre-Calc-Please check

Is this correct? Using Rational Roots Theorem, list all possible rational root of f(x) = 2x^3 - 3x^2 + 5x+6 Possible roots are p/a = -+1, -+2, +-3, -+6. -+3/2

### Pre algebra

Vernon drew an 8in. Wide by 5in.tall picture that will be turned into a 48 ft wide billboard.How tall will the actual billboard be?

### Course Help meeee

Hi if im going to take pre med courses to become a pediatrician .., am i going to take it all or just one ??? plleasseeee answer meeee

### Pre-Calc/Trig...

Stuck on these two questions, help me please. The graph of y=3x^2-4x+2 opens downwards. True or False? The graph of y=2x^2-4x+2 has a y-intercept of (0,1). True or False?

### Pre Algebra

a wire is stretched from the top of a 26-foot pole to a point on the ground that is 15 feet from the bottom of the pole. Approximately how long is the wire in feet? 16 21 30 37

### Pre algebra

The purchase price of a book is $35.85 the sales tax rate is 6.5% how much is the sales tax to the nearest cent what is the total cost of the book

### Algebra/ Pre Calc

The area of a circle is 78.5 square centimeters, and a subtending arc on the circle has an arc length of 6π. The estimated value of π is 3.14.

### pre algebra

a certain spinner has equally sized slices. the probability of landing on a red slice is 1/3 what are the odds in favor of landing a on a red slice

### Pre-Algebra

A chess club with 40 members is electing a new president. Lisa received 16 votes. What percentage of the club members voted for Lisa?

### Math/pre-algebra

A scale drawing has a scale of 1/4in.:6ft. Find the length on the drawing for each actual length. 12. 18ft 13. 66ft 14. 204ft

### Pre algebra

A store was offering 30 % off everything in the bike store . A boy bought a bike for $91 dollars. How much was the original price of the bike? please explain each step. We are studying proportions and percents. thanks

### Social Studies

I am stuck on my practice test and test and pre test of, The Revolutionary War. As you can see I am far behind. Can someone give me resources? I have read my books over and over again.

### Pre calc

The population of a Midwestern city decays exponentially. If the population decreased from 900,000 to 800,000 from 2003 to 2005, what will be the population in 2008? I thought it was 7542 but it is wrong can someone please help me thank you

### Math Pre-Calc.

Determine the domain and range of y= (radical) x-4 y= (radical) x^2-4 plz help me step by step. I just need to refreash my math, but i forgot how to find it

### pre calc

a roll of carpet is 9ft wide is 30 ft longer than a roll of carpet 15 ft wide. both rolls have the same area.find the dimemsions of each.

### pre- algebra

Method collected twice as much money as Lucy for a walkathon. Together they collected $120. Hoe much money did each person collect?

### pre-algebra

You are traveling to your mother's house that is 234 miles away. If you are currently twice as far from your home as you are from your mother's house, how far have you traveled?

### Pre-Algebra

One hundred nautical miles equals about 185 kilometers. To the nearest kilometer, how far in kilometers is 290 nautical miles?

### Pre-Calc

2. The polar coordinates of a point are given. Find the rectangular coordinates of each point. a. (5,(π / 4)) b. (-2,(π / 6)) NOTE: I tried to do these myself and got that: a= (4.99,0.27) b=(-1.99,-0.11) Which I know these are wrong, so I don't know how to do them..

### pre cal

Determine algebraically whether the function is even, odd, or neither even nor odd. f as a function of x is equal to 14 times the cube root of x

### Math Pre-Algebra

Simplify the Expression(-8/15)+(1/15). Show how to simplify in steps, using a property of operations for each step. Explain the property you use in each step. Can you help me please?

### Pre-Calc/Trig...

is this the correct formula for me to solve this? A bacteria culture has 2,000 bacteria. The number of bacteria increases by 5% each hour. How many bacteria are there after 12 hours? 2,000*0.05^(12-1)

### pre algebra

Wren bought a baseball card last year for $2.25. This year the price dropped to $.45. What was the percent of decrease in the price of the card A. 120% B. 500% C. 80% D. 400% A?

### Pre-Algebra

A mat is 3w inches wide and the frame is w inches wide around a 16in x 48 in poster. Type an expression for the amount of frame material needed.

### Pre-Calc 20

A rectangle has a diagonal of 18cm. The diagonal creates a 60 degree angle at the base of the triangle. Write an exact expression for the base and the height of the triangle.

### pre calc

Katie is watching a helicopter flying at an altitude of 5 miles. If the angle of elevation is pi/3 , the distance between Katie and the helicopter is approximately miles. NextReset

### Pre-Cal

If g(x) = tan (5x2), then g ′(x) = ? I've worked this problem out like four times already and I keep getting a complete different answer..So I think I'm doing it wrong. These are the answers I have gotten while doing this problem. g'(x)= cosx^2 5tan g'(x)= 2cosxtan^2

### Pre-Algebra

At a halftime show a marching band marched in formation. The lead drummer started at a point with coordinates (-2,-5) and moved three steps up and 1 step right. Write a rule to describe the translation. What were the coordinates of the drummers final position? Please help

### Pre-Algebra

Can someone show me how to solve this problem step by step?Here is the problem, 26cm/s= m/min,how to solve it by convert rate suing dimensional analysis.

### pre cal

The yearly attendance at a local movie theater is 82,000 and grows continuously at a rate of 5.1% each year. What is the approximate attendance at the movie theater in ten years?

### College pre-algebra

how do I simplify the following expressions and show my work? 6+5[(12 div. by2)+5]. (4div.by2)+8(5-3)to the second power. -8-72Div.by9x4to the second power + 11.

### Pre algebra

Tasha has a savings account which earn 8% interest. If she has $1400 in her account, how much interest will she earn in one year? I got $112.00 but it doesn't look right.

### pre calc

f(x)=-3x+2 a) express the slope of the secant line of each function in terms of x and h. b) find msecant for h=.5, .1, and.01 at x=1. c) find the equation for the secant line at x=1 with h=1.01 I got -3 for a but don't know how to do the others becaus a does not have x or h in...

### pre algreaba

Justin wants to use 188 ft of fencing to fence off the greatest possible rectangular area for a garden. What dimensions should he use? What will be the area of the garden?

### Pre-Algebra

how would I go about doing this problem? a (division sign) 4.9 = 8.33 Since this equation has a division sign...how would I solve it? Can I still do the original subtract and add method?...

### Pre-Calc

If tan theta equal - square root of 22 divided by 11 and pie/2 is less than theta and theta is less than pies, what is the cos of theta in simplified rationalized form

### pre algebra

the length of a rectangle is 6 cm more than its width. if 3 cm are taken from the length and added to the width, the figure becomes a square with an area of 64sq cm. what are the dimensions of the original figure.

### Pre-Calc

Find the vertical asymptotes, if any, of the graph of the rational function. Show your work. f(x) = (x-4)/(x(x-4)) How would I show my work? the x-4 cancel out and I am left with 1/x. The vertical asymp. is x= 0

### Math (pre-celc 12)

Write an expression for the x-values where the the maximum in the expression occurs: y=6cos((2pi/14)x)-2 I know that the maximum occurs every 14 units if you start at 0,0. I'm stuck after that.

### pre algebra

14 is what percent of 200 100/200 =x/14 read as 100% is to 200 as x% is to 14 solve for x by cross multiplying x=7 check it .07 times 200 = 14 vola!

### Pre algebtra Help Please!!

Determine which two equations represent parallel lines. (a) y = 5/7x + 4 (b) y = -7/5 x – 8 (c) y = 9x + 11 (d) y = 9x – 4 which have the same slope? which have the same slope?

### Pre Algebra

Find the missing length, when the perimeter is 9x+11. They give me 2 lengths: 2x+3 and 3x+1 how could I find the missing length x? would I add 2x+3+3x+1? and then subtract the total by 9x+11?

### pre-algebra

In a number square, the sum of the numbers in each row, column, and main diagonal is the same. Find the sum of the number square. a 7 2 1 5 b 8 c 4

### pre-algebra

it takes 1 cup of liqiud fertilizer to make 7 1/2 gallons of spray. How much liquid is needed to make 80 gallons of spray?

### Pre-Algebra

The length of a rectangular jewelry box is 5 inches more than twice the width. The perimeter is 28 inches. Find the length and the width.

### Pre Algebra

Four numbers are drawn from random tiles numbereed 0 through 9. What are the odds of drawing numbers 1 through four in any order?

### Pre-Cal

how do you find the vertex using two points, when no equation is given and neither points are the vertex? what formula can i use to find it?

### Pre algebra

mr. and mrs.green received a discount of $87 on a new electric stove. the discount was the result of a 1/4 of sale. what was the sale price of the stove?

### Pre algebra

A number multiplied by itself and then by itself again gives -1,000. What is the number? Please show the solution step by step

### Pre-Calc

Determine the one sided limit of f(x) s x approaches -2 from the right side. F(X) = (x^2-2x+4)/(x^3+8). I do not know where to begin. Should I plug in the one side limit?

### Pre-Calc

Evaluate the two trigonometric functions using its period as an aid. 1. cos (9pi/2) = ? Ans: 0 2. cos (-9pi/2) = ? Ans: 0

### Pre-Algebra

Use properties of equality to simplify each of the following expressions so that you can simplify them in your head. Identify the properties used and describe how you used them. 1. 4 • (–3) • 5

### Pre Cal

The intensity of light decreases by 4% for each meter that it descends below the surface of the water. At what depth is the intensity of light only 20% of that at the surface?

### Math

you have exactly $50.00 to spend on taxable groceries. they charge 4.3% sales tax on food. What is the most you can spend on food, pre-tax?

### Pre-Cal

Simplify the expression 1/tan^2x+1 tan^2x+1 = sec^2x = 1/sec^2x I am not sure what 1/sec^2x is equal to

### Pre Cal

which of the expressions are identical? a) cos^2x b)(cosx)^2 c) cos (x^2) d) (sinx)^-1 E) sin^-1 x f) sin (x^-1) g) 1/ sin x

### Pre Cal

find the domains of the following functions: a) f(x)=x^20 b) g(x)=1/(x-3) c) h(x)=1/(4x^2=21x-18) d) k(x)=sqrt (4x^2-21x-18) e) p(x)=1/sqrt(4x^2-21x-18)

### Pre-calc

I am given the graph of y=f(x) and I am asked to sketch the graph of y=-2f(-x). How do I move and/or rotate the given graph?

### Corporate Finance

1. TexMex Products is considering a new salsa whose data are shown below. The equipment that would be used would be depreciated by the straight-line method over its 3-year life, would have zero salvage value, and no new working capital would be required. Revenues and other ...

### Roots and Pre-cal

Find the roots of the function f(x)= x^2 +2x+2 a)-1 + sq root of 2 and -1 - sq root of 2 b) -1 + i and -1 - i c)-1 -2i sq root of 2 and -1-2i sq root of 2 d)-1 +2i and -1-2i The i's are in italics but I can't .make them in italic here for some reason completing the square: x^2...

### pre- algebra

Juanita lost her tennis racquet. She bought a new one for $30. This is $6 less than three times the price of her old one. How much did she pay for her old racquet?

### Pre Algebra

This is about Reasoning Strategy... It says this: 3a. What is the y-intercept of the trend line? 3c. Write an equation for the trend line in slope-intercept form. I don't really know what they mean? Please help me.

### Pre Cal

Solve 4sin^2 x + 4sqrt(2) cos x-6 = 0 for all real values of x. My answer: (pi/4)+2(pi)k, (7pi/4) + 2(pi)k Solve 2cos^2 x-5cosx+2=0 for principal values of x. My answer: 60 and 300 degrees

### Pre-cal

1) Find two values of Q that satisfy the equation. Give your answer is degrees and radians. Do not use a calculator. a) sec Q = 2 -pi/3 and 60 degrees Is this correct? b) sec Q = -2 This one I do not know how to find.

### pre-algebra

Sam has no more than $250 to spend on ceramic tile for his foyer. The rectangular floor in his foyer is 5ft. by 8ft. What can he spend per square foot on ceramic?

### Math Pre Algerbra

How did the teacher get this answer for this problem? Okay so heres two questions... first 24/4(2) = 12 and i believe he said he didn't use the (2) but... when i ask a question about a question like that they use the 2 like this 9*3 - 2(5) = 17

### Math Pre Algerbra

How did the teacher get this answer for this problem? Okay so heres two questions... first 24/4(2) = 12 and i believe he said he didn't use the (2) but... when i ask a question about a question like that they use the 2 like this 9*3 - 2(5) = 17

### pre calc

A rock is dropped form the top of a cliff. It takes 12 seconds to hit the ground. What is the height in feet of the cliff?? How fast is the rock moving when it hits the ground?

### pre-calc

a ship leaves port and sails for 2 hours north east and than 3 hours north west. If the speed remains constant, what course should the ship take home?

### pre algebra

robin is making bows to sell at her mothers yard sale she will use 3/4 foot of a ribbon and 2/3 of blue ribbon what is the ratio of the length of the blue ribbon to the red ribbon

### Pre calc aesthetic quadratic stuff

two numbbers have sum of 9 and product of 20. What singlevariable quadratic equation in form of ax^2+bx+c=0 can be used to represent the product of the two numbers

### Pre-Cal: Domain (cont.)

I figured out problems 1-7, arithmetically (thank you all for the help on that) But not number 8: f(x)=5/x , g(x)=7/(x+7) #7). Find (f/g)(x) Answer ==> [5(x+7)]/[7x] #8). Find the domain of (f/g)(x). (enter your answer using interval notation)

### Pre-Algebra

A radio signal travels at 3.00*10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54*10^7?

### Calculus

Integrate: x/(9+x^4)dx

### Calculus

lim--h>0 f(x+h)- f(x/h

### Calculus

If a, b, and c are digits for which 7 a 2 -4 8 b =========

### Calculus

If a, b, and c are digits for which 7 a 2 -4 8 b =========