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Lucy

Questions and answers by Lucy, page 3

Questions (625)

Use a sum or difference identity to find the exact value of sin 255 degreesAnswer: sqrt6-sqrt2/4 Thanks
1. 3 answers
2. 2,235 views
How do you work this problem. I cannot find an example in the book to illustrate how to work it.Find the value of tan(a-b) if
1. 1 answer
2. 423 views
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle
1. 1 answer
2. 1,089 views
If cos theta = 0.8 and 270<theta<360, find the exact value of sin 2thetaa) -0.96 b) -0.6 c) 0.96 d) 0.28 Answer: b 2) If csc
1. 6 answers
2. 3,363 views
How do you find the polynomial funtion that best models data givn in a table for x and f(x). The only example in my testbook
1. 6 answers
2. 496 views
Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of
1. 2 answers
2. 536 views
A farm supply store carries 50-lb bags of both grain pellets and grain mash for pig feed. It can store 600 bags of pig feed. At
1. 3 answers
2. 633 views
Find the number of possible negative real zeros for f(x)=6+x^4+2x^2-5x^3-12.Answer: 0 2) Approximate the real zeros of
1. 4 answers
2. 486 views
Approximate the greatest real zero of the function g(x)= x^3-3x+1 to the nearest tenth.I know that there is a zero between -2
1. 2 answers
2. 674 views
Help------I'm confused. I am trying to convert the linear equation 4x+3y-10=0 to polar form. Thus far, I have 2= r cos(theta
1. 1 answer
2. 484 views
Express 5-2i in polar form. Express your answer in radians to the nearest hundreth.r=sqrt5^2+-2i^2 which equals sqrt21.Arctan of
1. 1 answer
2. 727 views
Write the standard form of the equation of the circle that passes through the points at (4,5), (-2,3), (-4,-3).I have gotten to
1. 2 answers
2. 537 views
Express 5-2i in polar form. Express your answer in radians to the nearest hundreth.r=sqrt5^2+-2i^2 which equals sqrt21.Arctan of
1. 1 answer
2. 985 views
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle
1. 2 answers
2. 497 views
I don't understand this question at all.If f(x) = 4x - 3 and h(x) = 4x^2 - 21, find a function g such that f ͦ g = h.
1. 1 answer
2. 349 views
Working Backwards:In the 1980's the Northen White Rhinoceros population decreased by 485 from what it was in the 1970s. By the
1. 5 answers
2. 487 views
x^2 + 2x + 2 = 0The answer has an imaginary number in it which we're supposed to solve for, but I'm having trouble with it.
1. 4 answers
2. 517 views
How do I multiply more than two binomials?Something like: (a+bx)^3 (not necessarily cubed, though). I know to use FOIL, but I
1. 1 answer
2. 397 views
I just need help with these questions, thanks.i^5 3(-2i)^2 -i(isqrt5)^2
1. 3 answers
2. 373 views
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle
1. 2 answers
2. 583 views
Express 5-2i in polar form. Express your answer in radians to the nearest hundreth.r=sqrt5^2+-2i^2 which equals sqrt21.Arctan of
1. 2 answers
2. 614 views
Find the sixth term in the geometric sequence: sqrt3y^3, -3y^5, 3sqrt3y^7Answer: -27y^13 2) Find three geometric means between
1. 2 answers
2. 601 views
Consider a class with 10 sophomores, 8 juniors, and 6 seniors. Two students are selected at random.1) What is the probability of
1. 4 answers
2. 3,648 views
Find the twelfth term of the geometric sequence: 1/16, 1/8, 1/4....Common ratio: 1/2 I got the ratio by dividing 1/16 by 1/8
1. 4 answers
2. 1,132 views
I need help with this problem:9i - (5i + 4i)^2 The correct answer is supposed to be 9 + 49i, but my answer is no where near
1. 4 answers
2. 412 views
I need help with this problem (composite functions):If f(x) = 4x-3 and h(x )= 4x^2-21, find a function g such that f(g(x)) = h.
1. 4 answers
2. 793 views
Two cards are drawn from a standard deck of 52 cards. What is the probability of drawing 2 queens or 2 red cards?(4/52)(3/51)=1/
1. 2 answers
2. 513 views
The assignment: complete the sentences below with the appropriate indirect object pronouns.1) Yo les compro globos de muchos
1. 2 answers
2. 892 views
Find the rectangular equation of the curve whose parametric equations are x=-2sin t and y=cos t, where 0 less than or equal to
1. 2 answers
2. 656 views
I am having trouble with several problems:1) Find the coordinates of the center, foci, and the vertices, and the equations of
1. 1 answer
2. 535 views
I do not know how to work this problem:Find the area of the region between the graph of y=x^3 and the x-axis from x=1 to x=4. I
1. 3 answers
2. 428 views
Given that x is an integer, state the relation represented by absolute value y = x/2 and 0 is less than or equal to x which is
1. 3 answers
2. 787 views
I am having trouble with several problems:1) Find the coordinates of the center, foci, and the vertices, and the equations of
1. 1 answer
2. 468 views
Write the standard form of the equation of the circle that is tangent to x= -2 and has its center at (2,-4).Answer:(x-2)^2+(y+4)
1. 1 answer
2. 387 views
How do I write theta = 45 degrees in rectangular form??Thanks for your help.
1. 3 answers
2. 416 views
Identify the graph of the equation 4x^2-25y^2=100. Then write the equation of the translated graph for T(5,-2) in general form.A
1. 2 answers
2. 624 views
I am having difficulty with two problems:1) Evaluate (1+i)^12 by using DeMoivre's Theorem. Express the result in rectangular
1. 4 answers
2. 558 views
A set of data is normally distributed with a mean of 500 and a standard deviation of 40. What percent of the data is between 460
1. 2 answers
2. 553 views
How many ways can 5 students be chosen from a group of 4 juniors and 6 seniors to be on the prom committee if exactly 3 students
1. 4 answers
2. 733 views
Write the equation of the circle that passes through the point (3,4) and has its center at (1,2).Answer: (x-1)^2 +(y-2)^2 = 8
1. 1 answer
2. 366 views
Find the degree measure of the central angle whose intercepted arc measures 8cm in a circle of radius 15cm.Answer: -401.07
1. 2 answers
2. 819 views
Find the equation of the hyperbola whose vertices are at (-1,-5) and (-1,1) with a focus at (-1,-7).So far I have the center at
1. 4 answers
2. 1,409 views
Find the equation of the ellipse whose semi-major axis has length 6 and whose foci are at (3,-2+/-sqrt11).I have the focal
1. 2 answers
2. 514 views
Find the coordinates of the center, the foci, the vertices, and the equations of the asymptotes of the graph of the equation:
1. 2 answers
2. 748 views
Solve: x^2+y^2=10 and xy=3Answer: (+/-3, +/-1) or (+/-1, +/-3)
1. 1 answer
2. 247 views
solve 4 sin^2x + 4 sqrt 2 cos x-6=0 for all real values of x.Going by the example in the book I got to: 4 cos^2x + 4sqrt2 cosx
1. 4 answers
2. 2,801 views
Which of the following is NOT a root of z^2 = 1-sqrt3i to the nearest hundreth.a) -0.22+1.24i b) -0.97-0.81i c) 1.02-0.65i d)
1. 3 answers
2. 407 views
Write the standard form of the equation of the circle that is tangent to the line x=3 and has center at (-2,-7).Answer:
1. 2 answers
2. 1,045 views
Which of the following series is divergent?a) 1+3(1/4)+9(1/4)^2+27(1/4)^3... b) 1+3(1/5)+9(1/5)^2+27(1/5)^3... c)
1. 2 answers
2. 1,136 views
how many different ways can the letters in the word SOCIAL be arranged if the letter C must be directly followed by the letter
1. 4 answers
2. 1,749 views
a triangular shelf is to be placed in a curio cabinet whose sides meet at an angle of 105 degrees. If the edges of the shelf
1. 7 answers
2. 558 views
Nathaniel pulls a sled along level ground with a force of 30 newtons on the rope attached to the sled. If the rope makes an
1. 4 answers
2. 1,361 views
A surveyor sets a stake and then walks 150 feet north, where she sets a second stake. She then walks 300 feet east and sets a
1. 3 answers
2. 488 views
A golf ball is hit with an initial velocity of 135 feet per second at an angle of 22 degrees above the horizontal. Will the ball
1. 3 answers
2. 582 views
Jimmy has caught two fish in Yellow Creek. He has tied the line holding the 4.30 kg steelhead trout to the tail of the 1.39 kg
1. 3 answers
2. 601 views
A block slides down a frictionless plane having an inclination of 14.3°.If the block starts from rest at the top and the length
1. 4 answers
2. 662 views
I have a question about the symmetry of graphs, but maybe it's more of a simple factoring question...Why is f(x)=x+(1/x) odd,
1. 2 answers
2. 525 views
Hi, I need a little help with solving this question for c:(2c-1)^3=4c^2-1 I did this already: (2c-1)^3-(4c^2-1)=0
1. 1 answer
2. 366 views
Write a number equivalent to 100 using only the digit 9
1. 2 answers
2. 209 views
How do I write a characterization paragraph?What's an effective way of characterizing?
1. 1 answer
2. 441 views
A model of a planet shows a satellite moving in an elliptical orbit about the planet. The closest distance from the centre of
1. 2 answers
2. 1,098 views
4. In a backyard, there are two trees located at grid points A(-2,3) and B(4,-6).a) The family dog is walking through the
1. 2 answers
2. 532 views
A set of data is normally distributed with a mean of 16 and a standard deviation of 0.3. What percent of the data is between
1. 3 answers
2. 507 views
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
1. 2 answers
2. 1,032 views
What is the probability of getting an even number on a single roll of a number cube if you roll a 3 or greater.My answer: is 1/3
1. 3 answers
2. 580 views
find the first three iterates of the function f(z) = z^2+z-i if the initial value is i.My answers were: z=i; z1= -1, z2 = i, and
1. 3 answers
2. 474 views
Find the median on the data:[42,51,53,53,59,61,75,100] My work: 53+59/2=82.5 According to the teacher that is not correct but
1. 1 answer
2. 326 views
a red number cube and a white number cube are rolled. Find the probability that the red number cube shows a 2, given that the
1. 5 answers
2. 1,396 views
A 40-kg block of ice at 0°C is sliding on a horizontal surface. The initial speed of the ice is 7.0 m/s and the final speed is
1. 5 answers
2. 1,354 views
Can you name some good quotes from Macbeth which are relevant to The Witches or Duncan. Thanks.
1. 4 answers
2. 448 views
How would I balance this equation Ca(C2H3O2)2+K3PO4-->Ca3(PO4)2+KC2H3O2
1. 4 answers
2. 1,789 views
Why are alloys used to make coins rather than the pure metal?
1. 4 answers
2. 1,130 views
What type of reaction may be occurring when a person's skin develops a green stain beneath a 14 K gold bracelet? Using HA as the
1. 2 answers
2. 1,125 views
What happens to the bank lending, supply of money, and aggregate demand if the Federal Reserve increases discount rate to 3.5%
1. 1 answer
2. 468 views
Based on a Ksp experiment, describe a way to soften water by removing calcium ions. What would be the advantages and
1. 3 answers
2. 2,700 views
The following questions use a central charge of q1=+2x10^-4C1. What is the field strength at a distance of 5m from the central
1. 2 answers
2. 620 views
What is the potential difference required to accelerate a deuteron of mass 3.3x10^27kg and charges 1.6x10^-19C from rest to a
1. 6 answers
2. 1,579 views
Can someone please explain the answer I got for a question I previously posted on this page? I don't understand the solution I
1. 1 answer
2. 434 views
A grocery store is having a contest where you can win a prize by choosing a winning cereal box. The store publishes the chances
1. 1 answer
2. 443 views
How can you tell if moving electrons are being deflected by a magnetic field, an electric field, or both?
1. 3 answers
2. 573 views
write the chemical equation for the following:solid ammonium nitrite decomposes to form an inert gas and water vapor. so, I
1. 5 answers
2. 635 views
Officials are considering placing the sturgeon on the endangered species list. If such an action is taken, ships, including
1. 5 answers
2. 401 views
For some philosophers, writing is an unfortunate necessity, a means of communication that is at best irrelevant to the
1. 10 answers
2. 562 views
Given that y=x^2+2x-3When x is -3 what is y? Is the ans 0? When x is 1 what is y? Is the ans 0?
1. 3 answers
2. 261 views
How did federalism come about in the U.S? What short-comings of the original Articles of Confederation finally led to the
1. 1 answer
2. 320 views
I have to find the x-intercept.The equation is y=-2((x-4)^2)+1 I have to factor, but I have no idea how to factor this. I really
1. 1 answer
2. 388 views
What are the six food groups in the Caribbean?
1. 7 answers
2. 548 views
Six food groups in the caribbean please
1. 2 answers
2. 1,065 views
As water drains out of a 2000L hot tub, the amount of water remaining in the tub can be modelled by the function
1. 5 answers
2. 2,859 views
Botulism (a toxin produced by bacteria that causes food poisoning) and curare (a natural poison) inhibit the action of
1. 2 answers
2. 539 views
okay so What conclusion can you draw about eroision and decomposition on Landforms. Help ME!!
1. 2 answers
2. 221 views
I need help with the following problem. I do not understand how to finish working it.-3y^4/5+72=-15 -3y^4/5=-87 y^4/5=29
1. 3 answers
2. 305 views
compare and contrast the reactivity of the organometallic reagents R2Cd, RLi, R2CuLi, RMgBr, RZnBrwith respect to ethyl
1. 1 answer
2. 366 views
compare and contrast the reactivity of the organometallic reagents R2Cd, RLi, R2CuLi, RMgBr, RZnBrwith respect to ethyl
1. 1 answer
2. 393 views
Determine the exact expression for the following.- cos(pi/4)=(x/60) I got x=60/√2 Is that correct? Also, I had a lot of
1. 3 answers
2. 448 views
marc bought bananas, apples, and peaches. He bought twice as many lbs of bananas as apples, he bought 2 lbs more of apples than
1. 5 answers
2. 698 views
What are 2 3/4 and 3 6/10 equals to decimal numbers?
1. 3 answers
2. 372 views
a bike racer is riding on his new bike at silverstone. The track is 4km long. What is his average velocity over one lap?
1. 2 answers
2. 677 views
in this sentence - Grandma has just made chocolate chip cookies, what part of speech is the word "just"??
1. 2 answers
2. 556 views
If you wanted to code 94 distinct characters, such as those found on a coputer keyboard, how many dots would the system need?
1. 1 answer
2. 331 views

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