Pre- Calculus

21,824 results, page 42

1. pre-algebra

x+5/4=3/4x The next step would be obtained by subtracting 3/4 x + 5/4 from both sides. That gives yoju x/4 = -5/4 Now multiply both sides of the equation by 4.
2. pre alg.

In a pattern, the # of colored tiles used in row x is 3 to the power of x. Find the number of tiles used in rows a, 5, & 6. i don't get this problem & could use some help...
3. pre algebra

Is this how I would multiply? like if you have a whole number 3and 1/2yd multiplied by 4yd. Would I first multiply the 4x3 = 12 and 1/2? or no?
4. Pre Cal (logs)

I need help with these logs 1: Log underscore4 16X 2: 2 Ln ( X(sqr. root)e 3:5^[2logUnderscore5(3x)] 4:log underscore2 ^[1280-logunderscore2 5) I don't understand how to do them thanks
5. Pre- Caluculus

Find the time at which the depth of the water in the tank is eual to half its initial depth. D(t)=sqrt(100-2t) the tank is empty when t=50 min
6. Pre-Cal

Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
7. Pre-Cal

Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
8. Pre Calc

Derive the equation of the locus of all points that are equidistant from the point F(-3,4) and the line y=-2. Leave your answer in general form. [General Form: ax^2+by^2+cx+dy+e=0]
9. pre-calc

A hall 100 feet in length is to be designed as a whispering gallery. If the foci are located 21 feet from the center, how high will the ceiling be at the center?
10. Pre-Cal

From a point 50 feet in front of a church, the angle of elevation to the top of the steeple is 48 degrees. Find the overall height of the church and steeple.
11. Pre algebra

The width of a triangle is x-3 and the length is 2x-1. Write and solve an equation to find the perimeter and area of the rectangle if the measures of its length and width are in a 1:3 proportion
12. pre calc

Over the course of a year, the number of hours of daylight in Australia is modelled by H=12+3 cos(2pi/365 *t) where t is the time in days and T is the number of daylight.
13. Pre-Calc

if (0,-7) lies on the terminal side of angle theta in standard position, find each value sec(theta) , cot(theta) and sin(theta)
14. Pre-Algebra

6. If on the scale of a map, 3⁄4 inch equals 72 miles, what is the actual distance between 2 cities that are 3 7⁄8 inches apart on the map?
15. pre algebra check

The measures of two angles of a triangle are given. Tell whether the triangle is acute, right, or obtuse. 19°,35° I think its obtuse
16. Pre cal

Three digits are randomly selected without replacement for one 1, two 9's and one 6. What is the possibility that the three digit number is a multiple of 3?
17. pre-ap Algebra 2

write a polynomial function f of least degree that has the rational coefficients, a leading coefficient of 1, and the given zeros. Given zeros: -2,2,-1,3, sqrt 11
18. Pre-Cal

Christian is solving the equation x2 – 12x = 4 by completing the square. What number must be added to both sides of the equation to complete the square?
19. Pre-cal

Convert from DMS to Radians 1) 61degree 24' 2) 75degree 30' Convert from Radians to Degress 1) 2 2) 1.3 Please help how to solve and calculate it in calculator. I got confused. :( :)
20. pre alg

a 9 ft ladder is leaning against a wall so that Adam can hang a picture 7.5 ft above the floor. how far does the ladder need to be placed from the wall?
21. AP pre Cal

Forces with magnitudes of 45 N and 90 N act on an object at angles of 20 degrees and 115 degrees respectively, with the X-axis. Find the magnitude of the resultant of these forces.
22. Math

calculate the rate percentage per year if \$3240 is paid as intrest on 12000 for 2 and a half years. whats percentage pre year?
23. Pre-Cal

Find all Real solutions of the Equation: (ENter as comma sparated answers, if there are no real solutions then just leave as NRS) x^(4/3)-9x^(2/3)+14=0 x=?
24. pre algebra

Beth's savings account has \$100 to start. She deposited \$12 Monday, withdrew \$50 Tuesday, and deposited \$30 on Friday. What is her total savings now?
25. pre algrebra

thank you, Scott or whomever simplify the square root if 108 ok. I got 9x12 which then prime factorization = 2.2.3.3.3 then i get it means the square root of 2.2.3.3.3 but then i get stuck thank you
26. pre-algebra

what number sets does 0.125185623 belong to? I really don't get the concept of number sets such as integers, whole #'s, rational,and irrational. Please help!
27. pre calc

Take out the spaces: h t t p : //img 151. imageshack. us/my.p hp?image=graph bb0. png 1)I need to find the intervals on which it is increasing, decreasing, or constant 2) whether it is even odd or neither 3) domain and range
28. Chem Pre-Lab HELP!

Write the complete and net ionic equations for the following reactions. Be sure to indicate the states of the reaction products. 1) AgNO3(aq) + NaCl(aq) ----> 2) CaCl2(aq) + Na2SO4(aq) ----> 3) Pb(ClO4)2(aq) + NaOH(ag) ----> 4) (NH4)2SO4(aq) + BaCl2(aq) ---->
29. pre school

Considering storybooks with electronic features, educators believe that: a. they may be more educative than human read-alouds. b. they are not worth the money. c. they attract but do not hold toddlers attens for long. d. reading with a responsive adult is best.
30. Pre-Cal

Suppose è is an acute angle of a right triangle. For this function, find the values of the remaining five trigonometric functions of è. Round to four decimal places. sin è = 0.1 cos è = tan è = cot è = csc è = sec è =
31. Pre Calculous

(a) sin x if x = (1/4)degree Round all answers to three decimal places I got 12.053, 0.210, 4.363.. None of those seem to be right. What am I doing wrong? am i just punching the numbers in my calculator incorrectly?
32. Pre-calc/trig

i think its a or b Which scenario describes periodic behavior? A pendulum swinging back and forth A ball bouncing up and down on the ground The takeoff and landing of a jet plane The path a dolphin swims in the ocean
33. math

THE HUMAN CANNONBALL - AGAIN! (2 pts) On July 23, 1997, Washington County, in Oregon was advertising their Fair & Rodeo special attraction on the Internet: "As the countdown begins, David Smith, Jr. - THE BULLET - puts on his safety helmet, slides down the slender barrel of ...
34. Calculus

We are doing limits in Calculus, but now we are doing trig limits too and i do not get how to do any of them. For example ones like this, how do you do them? sec (x-1) / (x sec x) x approaches 0 ((3 sin (x)) 1 - cos(x)) / (x^2) x approaches 0 (sin (2x)) / (sin (3x)) x ...
35. pre-calc

find real numbers a,b,c so that the graph of the function y=ax^2+bx+c contains the points (-11,4), (2,3) , and (0,1) Write three equations, with each point in one. Then solve the three equations.
36. pre-algebra

Solve the inequality- a/3>4 -2n<10 p/(-2)<-5 Trreat the inequality sign just like the = sign in an equation. a/3>4 a/3 * 3> 4 * 3 a>12 Do similar processes with the other inqualities. I hope this helps. Thanks for asking.
37. pre-cal

Find the roots of the function f(x)= x^2+2x+2 Determine f(x) a) (x+1-i)(x+1+i) b)(x+1-i sqrt of 2)(x+1+i sqrt of 2) c)x-1+i)(x-1-i) d)x-1+i sqrt of 2) (x-1-i sqrt of 2) Please Help! For all of these, use the rule [f(x) + ai]*[(f(x) - ai} = [f(x)]^2 + a^2 where a is a real ...
38. pre alg.

In a pattern, the # of colored tiles used in row x is 3 to the power of x. Find the number of tiles used in rows a, 5, & 6. no one has responded to my question yet
39. pre-alg

In a pattern, the # of colored tiles used in row x is 3 to the power of x. Find the number of tiles used in rows a, 5, & 6. i don't get this problem & could use a little help, plz!
40. pre calc

Two forces of 50 and 70 N (newtons) act on an object. The angle between the forces is 40°. Find the magnitude of the resultant and the angle that it makes with the smaller force.
41. Pre-Cal.

Determine between which consecutive integers one or more real zeros of f(x)=3x^4+x^3-2x^2+4 are located? A. no real zeros B. 0 and 1 C. -2 and -3 D. -1 and 0 I was thinking it's either A or C? I need lots of help.

Earlier I posted a qustion about ordered pairs and I was asked to re-post the answer when I get it. 2x - 3y= 12 These are the two I had: (9,2) and (12,4) I found this one: (15,6) -MC
43. Pre Cal.

Find three geometric means betwee -sqrt(2) and -4sqrt(2). A: 2, -2sqrt(2), 4 Is 6 sqrt(2)+ 6 + 3sqrt(2)+... a convergent series? A: Yes. Is 1 + 3(1/2) + 9(1/2)^2 + 27(1/2)^3 +... a divergent series? A: Yes. Are these right?
44. Pre-Cal(Urgent)

Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
45. Pre-calc

1. Find the equation for a quadratic function whose vertex is (2,5) and whose graph contains the point (-8,15). 2.What are the x- and y- intercepts for y=2x^2+x-6 Plesee explai. I want to learn to learn how to do them.
46. Pre-Algebra B

A Venn diagram with two circles is drawn. Each circle has a diameter of 10 cm. The overlapping area is 20 cm^2. Find the total writing area within the diagram.
47. pre-algebra

The salaries ( in thousnds of dollars) of the managers of five local hardware stores are 50, 70, 60, 80, and 90. What is the difference between the highest paid and lowest paid managers?
48. Pre-Calc/Trig

Please help-I'm stuck really bad What are the roots of the equation x^2 - 4x + 3 = 0 I think I was suppose to use b^2 - 4ac so it would be -4 - (-4)*1*3 = 12 so the roots would be 12 and -12 Thank you for any help you can provide

Calculate the exact values of the cot(theta) and sin(theta) for the acute angle theta if sec(theta)= the square root of 6. Thank you so much!
50. Pre-Calc/Math

if (0,-7) lies on the terminal side of angle theta in standard position, find each value sec(theta) , cot(theta) and sin(theta)
51. Pre calc

A set of 500 values has a normal distribution. The mean of the data is 24 and the standard deviation is 2. Find the range about the mean which includes 50% of the data.
52. math pre-calc h

It says which expressiion is equivalent to sec T + csc T / 1+tan T a. sin t b. cos t c. tan t d. csc t I'm not sure what to do first to find it out.
53. pre algerba

For the past 4 weeks, you have saved \$5 per week. You know have \$65 in your savings account. Write an equation that represents your balance A after t weeks.
54. Math

I am having trouble with a pre-cal problem. If you could explain how to do it that would be great! ((3^3)^(cosx+2/3sinx))^2cosx+3sinx all divided by ((3^sinx)^13)^cosx = x
55. Pre-algebra

David must choose a number between 49 and 95 that is a multiple of 4, 6, and 8. Write all the numbers that he could choose. If there is more than one number, separate them with commas.
56. Pre-Calc/Trig...

A ball is thrown upward with an initial velocity of 4ft/sec from a height of ten feet. what is the maximum height that the ball will reach. h(t)= -16+vt+s
57. Pre-Calc

A point on the terminal side of an angel theta is given. Find the exact value of the indicated trigometric function (-1/5,1/2 ) find cos theta
58. Math

What is the scale factor in the following dilation? The red triangle is the pre-image. 3 one-third 2 one-half I can't provide image but does anyone know what I'm talking about?
59. Math (pre-celc 12)

In how many ways can a school president, a vice-president, and secretary be chosen from 21 students? I'm not sure to find this answer since there is no order in which they are chosen.
60. pre algebra

The ball game took in \$1,920 one Saturday. The number of \$12 adult tickets was 15 more than twice the number of \$5 child tickets. How many of each were sold?
61. pre algebra

which inequalty statment is true? a. 8 < ã78 <9 b. 38< ã78 <40 c. 77 < ã78 <79 d. 6.083 < ã78 <6.085
62. Pre-Calc

Establish the identity. sinx + cosx/sinx - cosx = 1+2sinxcosx/2sin^2x-1

1)f(x) = -x + sqrt 4 - x^2 Find f(-2) -(-2) + sqrt 4 - (-2)^2 = 2 + sqrt 4 + 4 2 + sqrt 8 = 4.828 Is this correct?
64. pre cal

how do you work out cot squared feta - CSC squared feta?
65. Pre calc

Find solutions on interval 0,2pie (cosx/1+sinx) + (1+sinx/cosx) = -4
66. pre calc

sin 20 pi cos 9 pi cos 13pi/2 sin(-17 pi0 are all of these undefined?

If the formula D(x,y) = (.7x,.7y) is applied to pre-image point (5, -7), what is the image point?

The probability that you will win a contest is 76%. What is the probability that you will lose the contest? 24%
69. Pre-calculas Math

how to find the exact value of: cos(9*pi/12)*cos(5*pi/12)+sin(9*pi/12)*sin(5*pi/12)
70. pre-algebra

The length of a kitchen is 1 1/4 inches. The actual length is 20 feet. What is the scale of the kitchen
71. History

What do we mean when we say the modern world? When did it begin? How is it different from the pre-modern world?
72. Porportions (Pre-Algerbra)

2/3 = 12/x A)x= 18 B)x= 12 C)x= 36************** D)x= 8 22 miles/ 55 hours = 12 miles / H hours A 48 B 30 C 45************** D 22 6/11 = 84/x A) x=40 B) x=120********* C) x=254 D) x=154
73. Pre Calc

Verify the identity: sin x/tan x + cos x/cot x = sin x + cos x
74. pre cal 11

the sum of the first n terms of an arithmetic series is Sn=2n^2+5n. Determine the first 3 terms. Help!!!
75. Calculus

You have been asked to determine where a water works should be built along a river between Chesterville and Denton to minimize the total cost of the pipe to the towns. (a) Assume that the same size (and cost) pipe is used to each town. (This part can be done quickly without ...
76. us history

What groups fought against the taxes and acts? Which group was most responsible for the actions taken against the Brits? Are you asking about the pre-Revolutionary period in America? Please clarify your question and we'll try to help you.
77. Pre-Cal

Find the standard form of the equation of the ellipse. (Remember center is midpoint between either foci or vertices) (1) 9x^2+4y^2+36x-24y+36=0 (2) Vertices: (0,5)(0,-5) Passes through the point (4,2) Centered at the origin
78. Pre-Algrebra

Alecia deposited \$500 in a savings account at 5% compounded semiannually. What is her balance after 5 years? Can you please show me step by step how to do this problem. The choices are \$650.00 \$640.04 \$670.05 \$897.93
79. Pre-Algebra

Grete Waitz won the New York marathon nine times. The rate at which she ran during her last victory in 1988 was 26 miles in 148 minutes. To the nearest hundredth, what was the unit rate for her last race?
80. Pre Algebra

I have to design new dice for a board game. I have to use two standard cubes each with six faces and number then in such a way the the probability of rolling the numbers 1-12 are the same
81. pre ap chemistry

you will need to explain in detail how to make 100.0 ml of a 0.500M CUSO4.5H20(s) SOLUTION. BE SPECIFIC about the measurements you would make and the type of equipment you will use . write out steps
82. Pre-Cal

A penny is dropped from the top of Bank of America building. How long does it take to reach the group? Assume the back is 1024 ft high. My work so far: -16t^2+0t+1024 t=8 sec Is this correct? Thanks!
83. Pre-Cal (Help Plz)

The question I've been trying to figure out is asking me to explain how the graph of (g) is obtained from the graph of (f). The graphs are as followed: - f(x)= x^(2)-4 - g(x)= [x^(2)-4] (Note: the Brackets represent absolute value symbols around the expression for g(x))
84. calculus help

Produce graphs of f that reveal all the important aspects of the curve. Then use calculus to find the intervals of increase and decrease and the intervals of concavity. f(x)= 1+(1/x)+(5/x^2)+(1/x^3) find the interval of increase. find the interval of decrease. find the ...
85. pre-algebra

which product equals 3t-12? What options do you have to choose from? Without that information, we cannot help you. Give us the options with your reasoning for your choice, and we will be glad to give you feedback. I hope this helps. Thanks for asking.
86. Pre-Algebra

Can someone show me how to answer these questions step-by-step? Thanks! Solve the equation for y in terms of x 1.2x + 7= y 2. x- 2/3y= 3 3.-12x + 3y = 48 Give any three ordered pairs that are solutions of the equation 4. -1/4y - x =0 5. 5x - y= -5 -MC
87. pre algebra

I have a problem and I would like to know how to work out the problem to get the answer. Write an algebraic expression for each phrase product of m and n -2 What are the steps in working this out?
88. pre-algebra B

Milli tosses a coin and a six-sided die.The numbers on the die are 1 through 6. What is the probability that Milli will toss a tail and roll an odd number?
89. Pre Algebra

A consultant traveled 9 hrs to a meeting. The return trip took only 8 hrs because the speed was 10 miles per hr faster. What was the consultants speed each way?
90. Honors Pre-Cal

We're reviewing and I forgot how to do this. Given y=x2-4+3 (x2 is x squared) a)write in standard from b)find vertex c)find equation of the axis of symmetry d)find the x-intercepts e)find the y-intercept
91. 11th grade pre ap physics

An athlete whirls a 7.00 kg hammer tied to the end of a 1.1 m chain in a horizontal circle. The hammer makes one revolution in 0.9 s. What is the tension in the chain?
92. Pre-Calc

A mirror is in the shape of a paraboloid. If a light source is 6 feet from the base along the axis of symmetry and the opening is 12 feet across, how deep should the mirror be?
93. Pre Cal

a 6 foot person is standing x feet away form a 10 foot lamppost. What is the distance d from the base of the lamppost to the end of the persons shadow, espressed as a function of x.

Please help-I'm stuck really bad Thank you for any help you can provide What are the roots of the equation x^2 -4x + 3 = 0 x^2 - 4x = 3 x^2 +2(-2)x + -2^2 = -3 = -2^2 x^2 + -4x + 4 = 1 (x + -2)^2 = 1 qrt (x+-2)^2 = sqrt 1 x+-2 = plus or minus 1 therefore x=1 x=3 roots are 1 and 3
95. Pre Algebra

The temperature was 72 degrees F. At midnight a cold front moved in dropping the temperature 12 degrees F. Write a number sentence to show result. I need help! Thanks to anyone helping.
96. physics pre-ap

A(n) 1100 kg car is parked on a 4 incline. The acceleration of gravity is 9.8 m/s2 . Find the force of friction keeping the car from sliding down the incline. Answer in units of N
97. Pre-Cal.

find the inverse of the following function. Find the domain, range,and asymptotes of each function. Graph both functions on the same coordinate plane. f(x)=3+lnx
98. Pre Algebra

In the given right triangle, find the missing length. The triangle has 24m on the right and on the left is c and at the bottom is 10m. a. 28m b. 26m c. 25m d. 27m
99. Pre-calc

a rectangular yard is to be enclosed by a new fence on 3 sides and by an existing fence on the fourth side. the amount of new fencing to be used is 160 feet
100. Pre-calc

a rectangular yard is to be enclosed by a new fence on 3 sides and by an existing fence on the fourth side. the amount of new fencing to be used is 160 feet