# Pre- Calculus

21,686 results, page 44

1. ### Pre-Algebra

A right triangle has an area of 21 m2. The dimensions of the triangle are increased by a scale factor of 4. What is the area of the new triangle? A. 42 m2 B. 84 m2 C. 168 m2 D. 336 m2 How would I solve this?
2. ### English

I noticed I misspelt a few words. I'm posting it to you again. 1) During the long reign of Queen Victoria artists reacted differently to the new world shaped by the Industrial Revolution. 2) In particular, some grew/were (?) dissatisfied with Victorian materialism and found ...
3. ### pre calc

you are 7 miles north and 4 miles west of a cabin.how far are you from the cabin? on what bearing must you walk to reach the cabin?
4. ### pre-algebra

A football team gained 4 yd, lost 2 yd, gained 11yd, lost 8 yd, and then lost 9 yd. Find the net gain or loss.
5. ### pre-cal

for the given functions f & g find the specified value of the following functions and state the domain of each one. f(x)=2+6/x; (g)x 6/x a. (f-g)(3)= what is the domain of f-g? b. (f/g)(6)= what si the domain of f/g?
6. ### math,pre algebra

Apples sell for 1.29 a pund and there is an average of 3 apples per pund.About how many apples would you expect to get for 5.00
7. ### Pre-Algebra

Write an Integer to represent each situation. 1- 1,240 feet above sea level. 2-16 degrees below zero 3- a withdrawl of \$490 4- 2-point penalty ina video game I do not understand your question. You have already provided integers.
8. ### pre calc

Find an equation of the cubic polynomial f(x) = ax3 + bx2 + cx + d that passes through the given points. P(0,-4) Q(1,-8) R(-1,-8) S(2,-2) Ive tried this every which way and i cant seem to get any of these..i know your supposed to plug it in and all but its just not working for...
9. ### PRE-CAL

Complete the table for the time t (in years) necessary for P dollars to triple when interest is compounded continuously at rate r. (Round your answers to two decimal places.) R=2% t=? tried to plug in as A=Pe^rt since continiously 3=e^.02t ? then take the ln of both sides? (...
10. ### Pre-Algebra

A ball is thrown straight up at 46 feet per second from about 6 feet above the ground. How long will it take for the ball to reach a height of 39 feet?
11. ### pre calc

A radioactive element decays exponentially according to the function Q(t) = Q0ekt .If 100 mg of the element decays to 25 mg in 12 days, find the half-life of the element. please help
12. ### Math pre algebra

Australia's population is approximately 2.5×10^7. The area of Australia is 2.95×10^6 square miles. What is the approximate average number of people per square mile in Australia?
13. ### Pre Cal

Let P be the point on the unit circle U that corresponds to t. Find the coordinates of P and the exact values of the trigonometric functions of t, whenever possible. (If there is no solution, enter NO SOLUTION.) 9pi/4 Looking for sin, cos, tan,cot, csc, and sec
14. ### pre calc

I have a few problems from my homework that I am having trouble with. #1 Find the difference quotient of f foreach function f(x)=1/(x+3) I got -2x+6 #2 Express the area of an isosceles right triangle as a function of the length x of one of the two eual sides Thanks
15. ### Help me anyone - Pre-Calc

A farmer uses an irrigation sprinkler system that pivots about the center of a circular field. Determine the length of the sprinkler if an area of 2340 square feet is watered after a pivot of 20°. P.S: The formula is A=1/2 theta r^2 Please help me. Thank you.
16. ### pre-calc help !!!!!!!

#1 cos x+sec x=2 #2 (1+tan x)^2= 2 tan x+2 #3 cos^2x-sin^2 x+1=cos x please show all work & thanks
17. ### Pre Algebra

The ratio of the length of a rectangular field to its width is 10:7 if the width of the field is 70 meters find the perimeter of the field.
18. ### PRE-CALC

sin(arctan(-4/3) okay so i made arctan(-4/3) = x so im solving for sin(x) and x= arctan(-4/3) so then tanx = -4/3 and now im stuck i don't know what to do after that
19. ### Pre-Calc Help!!!

Prove the identity. (show your work please) tan(x − π/4)= (tan x − 1)/(tan x + 1) Thank you!
20. ### pre algebra

a community has 1316 females. if 47% of the community is female and 16% of all the females are left-handed, how many people are in the community?

22. ### pre calc

an earth satellite in circular orbit 1250 kilometers high makes one complete revolution evry 90 min. What is it linear speed? use 6400 kilometers for the radius of the earth.
23. ### Pre-Cal

given the function y=2sin3x-1, identify the following below. also show its graph for the primary cycle. (identifying parts of a trig. equation) asymptotes= k= c= axis= primary cycle= period=
24. ### Pre-Calc

I'm so stuck-this stuff is so far above me right now-Please help where do I even start? Any hint would be so helpful- (3x^3-5^2+6x-9)/(x+5) or can someone direct me to a site that can solve this and show the steps-I don't even know where to start Thank you
25. ### Pre-algebra

Could someone please help me solve the following problems, and show me how to do the work? I am getting confused, and need something to refer to when doing future problems. Thank you so much! (6x+1)(x^2-9x+5) (2x^4+3)(4x^3+2) (12y^3+8y^2+20y) div. by 2y (6x^2-25x-10) div. by (...

1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9 = -1/5*1/2621444 = -1/1310702
27. ### pre cal

A rectangular parcel of land has an area of 4,000 ft2. A diagonal between opposite corners is measured to be 10 ft longer than one side of the parcel. What are the dimensions of the land, correct to the nearest foot?
28. ### Pre-Calc Helppp!!!

Find the indicated angle è. (Use either the Law of Sines or the Law of Cosines, as appropriate. Assume a = 110 and c = 136 (angle B=38) Round your answer to two decimal places.)
29. ### pre cal

Use the graph of f to estimate the local maximum and local minimum. A piecewise graph is shown with a line increasing to 0,-2 terminating at that point and a curve starting at 0,0 and intercepting the x axis at 0, pi, and 2pi. Please Help!!!
30. ### Human Services/ University of Phoenix

Identify three considerations that should be a part of a program and proposal pre-planning process of grant proposal writing. This is a generalized question, no particular grant application.
31. ### Pre algebra

Tropical storm alpha has winds of 50 miles per hour. Write and solve and an inequality to find how much of the winds need to decrease so that the storm is downgraded to 39. Please help, explain steps
32. ### Pre Algebra

6. Given the function rule f(x)=x^2-3x+2, what is the output of f(-2)? A. -8 B. 0 C. 4 D. 12 7. Suppose you earn \$15 for each car you wash. Which function describes the relationship between your total earnings E and and the number of cars you wash C? A. E(c)=c+15 B. E(c)=15c C...
33. ### Pre-Calc

A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 3 mi apart, to be ∠x = 35° and ∠y = 45°, as shown in the figure. (Round your answers to two decimal places.)
34. ### pre calc

you are 7 miles N & 4 miles W of the cabin how do you get back to the cabin? Bearing?
35. ### pre-algebra

if measure angle one = 56 degrees then measure angle 4=
36. ### trig pre calc

cos x (sec x +cos x csc2x)=csc2x
37. ### pre-algebra

a tree is 5 ft. tall and has a shadow of 12 ft. if you are 5 ft. tall, what is the length of your shadow
38. ### pre-algebra

a tree is 5 ft. tall and has a shadow of 12 ft. if you are 5 ft. tall, what is the length of your shadow
39. ### Pre-Algebra

The sum of a number and 3, multiplied by the sum of the number and 4 is equivalent to 16
40. ### pre statistics

In a recent health study it was claimed that 18% of americans are underwieght.If 4 americans randomly selected what is the probability that a. that all will be underweight b.none will be underweight c. at least one will be underweight
41. ### Math - Pre Algebra

Simple and Compound Interest Find the simple interest. principal= \$870 interest rate= 6% time= 9 months Please help me I need the answer for tommorow.
42. ### pre-cal

Use Pascal's triangle to expand the expression. (x − y)5 so I tried to work this out: (x-y)^5 = [(x-y)(x-y)][(x-y)(x-y)](x-y) (x-y)^2 = (x-y)(x-y) = x^2 - 2xy + y^2 x^2 - 2xy + y^2)(x^2 - 2xy + y^2) = x^4 -4x^3y + 6x^2y^2 - 4xy^3 + y^4 I am still confused can any body ...
43. ### pre-cal

A small ferris wheel, a student is riding a 20-m-diameter ferris wheel that is making 3 revolutions per minute. What is the area of the sector between 3 of the seats (3/8) of the wheel?
44. ### pre cal

A small ferris wheel, a student is riding a 20-m-diameter ferris wheel that is making 3 revolutions per minute. What is the area of the sector between 3 of the seats (3/8) of the wheel?
45. ### Pre-Cal

A 13-ft ladder leans against a building so that the angle between the ground and the ladder is 63 degrees. How high does the ladder reach on the building? (round your answer to the nearest foot)
46. ### PRe calc story problem!!

A radioactive element decays exponentially according to the function Q(t) = Q0ekt .If 100 mg of the element decays to 25 mg in 12 days, find the half-life of the element.
47. ### math- pre calculus

you are depositing \$1000 dollars in a savings account and are given the following options. 6.2% annual interest rate, compounded annually 6.1% annual interest rate, compounded quarterly 6.0% annual interest rate, compounded continuously for each option, write a function that ...
48. ### Pre Calc (For Reiny)

Thanks so much your method worked perfectly! My solution was: the remaining zeros were 5+2i, 3, and -4 I have one question that's bugging me though, why is it that synthetic division did not work for me? I thought that long division and synthetic division were both ...
49. ### Pre Cal

2+square root of 4-x=x rewrite it as √(4-x) = x-2 now square both sides 4-x = x^2 - 4x + 4 x(x-3)=0 so x = 0 or x = 3 BUT when we square an equation, all answers must be verified in the original equation Which answer works and which doesn't?
50. ### math,pre statistics

In a recent health study it was claimed that 18% of americans are underwieght.If 4 americans randomly selected what is the probability that a. that all will be underweight b.none will be underweight c. at least one will be underweight
51. ### Pre-Cal

Use the fundamental identities to simplify the expression. csc Q / sec Q so this would be 1/sinx / 1/cosx and then 1/sinx times cosx/1 = sin x cosx Is this correct so far? If it is I do not know what to do next.
52. ### PRE CAL. JOURNAL

A BAG CONTAINS 3 RED CHIPS, 2 BLUE CHIPS AND 1 WHITE CHIP. IF 2 CHIPS ARE CHOSEN FROM THE BAG WITHOUT REPLACEMENT DETERMINE THE PROBABILITY THAT THEY ARE OF DIFFERENT COLORS
53. ### pre calc

a kite currently flying at an altitude of 16 meters above the ground. If the angle of elevation from the ground to the kite is 30 degrees, find the length of the kite string to the nearest meter.
54. ### Pre-Calc/Trig...

If An is defined as a geometric sequence, is the sequence 1/an also a geometric sequence? Explain your reasoning
55. ### pre algebra

If a sail of a ship is 10 feet long and has a diagonal length of 26 feet, what is the height of the sail in feet? A 29 B 24********** C 17 D 8
56. ### pre cal

The function f(x)=x2+6x+18 can be obtained from an even function g by shifting its graph horizontally and vertically. That even function is g(x)= ?
57. ### pre cal

Given that f(x) is a cubic function with zeros at −5, 2, and 4, find an equation for f(x) given that f(−10)=−4.
58. ### pre cal

Given sin(α)=4/5 and 0<α<π/2, find the exact value of sin(α/2).
59. ### pre cal

Given sin(α)=4/5 and 0<α<π/2, find the exact value of sin(α/2).
60. ### Programming & Algorithm

(1) How to design algorithms to implement the stack operations. (2) Write a program to multiply any two matrices. (Using Basic) and finally, (3) Consider the algebraic expression E=(2x+y)(5a-b)^3. Draw the tree T which correspond to the expression E and find the pre-order ...

Which of the following is considered plagiarism? A. copying someone eles's work. B. using a statistic and forgetting to give credit to the source. C. Buying a pre-written essay from the internet and using it as your own. D. All of the above. I got D am I right ? What do you ...
62. ### Pre-Calc

How do I determine if there are common factors for x^5+3x^3+5x/4X^4+2x^2, when the leading coefficient of the denominator is greater than that of the numerator, and there is no constant in the numerator - thus making using the roots calculator impossible, and long division. I ...
63. ### edu 673

Choose one differentiated assessment strategy (either pre, formative, or S summative) from the course text (or from the recommended websites video) and present a rationale for using the assessment to meet the needs of diverse learners and how it will be used to drive future ...
64. ### Pre- Algebra

You buy x pairs of shoes that each cost \$24.95 the same number of socks that each cost \$4.75 and a pair of pants that costs \$29.99 write an expression in simplest form that represents the total amount of money spent. Would you add them all together?
65. ### Pre Cal

how would i find the degrees of cos x= 3/2 if (0 <or= theta < 360)? i've tried putting it in my calculator with cosine^-1 but im just getting err:domain. Please help! The cosine function only goes from -1 to +1. There is no solution to cos x = 3/2. thank you!

A polynomial of degree 4 that increases the y-axis at 6 and whose y-values get more and more negative as x -> +infinity and x -> -infinity -Represent a function that satisfies the given conditions by an equation. Leave in factored form.
67. ### Pre-cal

use mathematical induction to prove that 1^2 + 2^2 + 3^2 + ... + n^2 = n(n+1)(2n+1)/6 for all positive integral values of n. My work: n=1: 1(1+1)(2(1)+1)/6 = 1(2)(3)/6 = 6/6 = 1. 1^2+2^2+3^2...(n-1)^2+n^2= [(n-1)(n-1)+2n(n-1)+1]/6 = 2n^3+3n^2+n/6 = n(2n=1)(n+1)/6 = n(n+1)(2n+1...
68. ### Pre-Algebra

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
69. ### pre-calc

A fire has started in a dry open field and is spreading in the form of a circle. If the radius of this circle increases at the rate of 6ft/min, express the toatal fire area A as a function of time t (in minutes
70. ### pre-calc

A fire has started in a dry open field and is spreading in the form of a circle. If the radius of this circle increases at the rate of 6ft/min, express the toatal fire area A as a function of time t (in minutes
71. ### progamming JAVA

1.Write an algorithm, in English, to solve the following problem. Be sure to include pre- and post-conditions! 2.Problem: Solve X mod Y for all positive integers. Do so without using multiplication or division. 3.What is (7 / 3) + (4 % 5)?
72. ### pre school

The comparison to children with adhd-hi, children with the subtype adhd-pi are greater risk for? A.ANTISOCIAL BEHAVIOR B.REJECTION FROM OTHERS C.ANXIETY AND MOOD DISORDERS D. PLACEMENT IN SPECIAL EDUCATION CLASS *I THOUGHT C BUT WASN'T SURE
73. ### Trig/pre-calc

r=8cos(theta)+5sin(theta), convert the polar equation into a rectangular equation and then complete the square and determine the center radius...? Help?! I missed the section, and am not getting anywhere with the text...
74. ### Math (College Pre-Cal)

The exact conversion between the English measurement system and the metric system is given by the equation 1 inch= 2.54 cm. Let f(x) be the number of miles in x meters. Find a formula for f(x). Give an exact answer.
75. ### Pre-Calc

I do not know which value I am solving for or how to get there these are the instructions and info given. Use the given conditions to find the exact value of the expression. sinx=(-5/13), tanx>0, sin(x-(pi/3)) There is no question and the answer is ((12(sqrt3))-5)/26 from ...
76. ### calculus

f(x+k,y)-f(x,y)/k when f(x,y)=4x^2y

1.
78. ### calculus

f(x)=2x^2-x g(x)=3x+2 f*g= g*f= f*f= g*g=
79. ### calculus

f(x)=x+1/x g(x)=x+1/x+2 f of g? g of f? f of f? g of g?
80. ### calculus

How do you do it

R^0.5-90=0

R^2+R^2=R^3
83. ### calculus

xy^3-e^3x=y^2

x^2/3 (x-9)

I=g^2/da
86. ### Calculus

y = ln(3x+5), then d^2y/dx^2 = a. 3/(3x+5) b. 3/((3x+5)^2) c. 9/((3x+5)^2) d. -9/((3x+5)^2) e. -3/((3x+5)^2)
87. ### calculus

f'(x) = (x^2-1)/x
88. ### Calculus

Let f(x) = ln(((2x–5) / (7x+4))^(1/2)). f'(x) = ...
89. ### calculus

dh/dx x = 7 , h (x) = (x^-1/2 + 8x)(4 - x^-1)
90. ### calculus

f'(x) of f(x)= 4e^x/1-e^x
91. ### Calculus

If y=ln((3x+2)^6(x+10)^3), then dy/dx=
92. ### calculus

dx/dt=5x-2y,dy/dt=4x-y

X2-7x-12/x-2
94. ### calculus

x = 6 h(x) = (x-1/2 + 5x)(1 - x-1)
95. ### calculus

f(x)=1-3x when f(x)-f(1)/x-1
96. ### Calculus

What is y' of y=(x-1)^(1/2)/(x-3)^(1/2)?
97. ### Calculus

why does ln(1/x)= -1/x ?
98. ### calculus

(10/((n^2)-1)+((2n-5)/(n-1))=(2n+5)/(n+1)
99. ### calculus

y= [(2x-1)(x^2) + x]
100. ### Calculus

if x^2 + y^3 = (x^3)(y^2) then dy/dx = ? thanks