Questions and answers by

Lucy

Questions (642)

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. 2 answers
2. 470 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. 2 answers
2. 2,883 views
Solve: x^2+y^2=10 and xy=3Answer: (+/-3, +/-1) or (+/-1, +/-3)
1. 1 answer
2. 289 views
Find the coordinates of the center, the foci, the vertices, and the equations of the asymptotes of the graph of the equation:
1. 1 answer
2. 818 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. 1 answer
2. 583 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. 2 answers
2. 1,491 views
Find the degree measure of the central angle whose intercepted arc measures 8cm in a circle of radius 15cm.Answer: -401.07
1. 1 answer
2. 884 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. 426 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. 3 answers
2. 806 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. 1 answer
2. 598 views
I am having difficulty with two problems:1) Evaluate (1+i)^12 by using DeMoivre's Theorem. Express the result in rectangular
1. 3 answers
2. 637 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. 1 answer
2. 699 views
How do I write theta = 45 degrees in rectangular form??Thanks for your help.
1. 2 answers
2. 455 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. 432 views
I am having trouble with several problems:1) Find the coordinates of the center, foci, and the vertices, and the equations of
1. 0 answers
2. 542 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. 2 answers
2. 847 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. 2 answers
2. 485 views
I am having trouble with several problems:1) Find the coordinates of the center, foci, and the vertices, and the equations of
1. 0 answers
2. 596 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. 1 answer
2. 696 views
The assignment: complete the sentences below with the appropriate indirect object pronouns.1) Yo les compro globos de muchos
1. 1 answer
2. 970 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. 1 answer
2. 574 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. 2 answers
2. 904 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. 3 answers
2. 455 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. 1 answer
2. 1,241 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. 2 answers
2. 3,751 views
Find the sixth term in the geometric sequence: sqrt3y^3, -3y^5, 3sqrt3y^7Answer: -27y^13 2) Find three geometric means between
1. 1 answer
2. 675 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. 694 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. 656 views
I just need help with these questions, thanks.i^5 3(-2i)^2 -i(isqrt5)^2
1. 2 answers
2. 411 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. 0 answers
2. 469 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. 2 answers
2. 566 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. 4 answers
2. 554 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. 394 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. 554 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. 0 answers
2. 1,059 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. 1 answer
2. 614 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. 0 answers
2. 816 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. 0 answers
2. 536 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. 1 answer
2. 757 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. 3 answers
2. 571 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. 0 answers
2. 716 views
Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of
1. 1 answer
2. 607 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. 5 answers
2. 565 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. 0 answers
2. 1,157 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. 5 answers
2. 3,490 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. 480 views
Use a sum or difference identity to find the exact value of sin 255 degreesAnswer: sqrt6-sqrt2/4 Thanks
1. 1 answer
2. 2,329 views
Find a numerical value of one trigonometric function of x iftanx/cotx - secx/cosx = 2/cscx a) cscx=1 b) sinx=-1/2 c)cscx=-1
1. 1 answer
2. 972 views
State the period and phase shift of the function y=-4tan(1/2x + 3pi/8)a) 2pi, -3pi/4 b) pi, 3pi/8 c) 2pi, 3pi/8 d) pi, -3pi/8
1. 4 answers
2. 1,471 views
Write an equation of the tangent function with period 3pi/8, phase shift -pi/5, and vertical shift -2.Answer: y=tan(8x/3 -
1. 1 answer
2. 1,711 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. 0 answers
2. 1,154 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. 0 answers
2. 481 views
I need help-I do not understand.The question is this: Write 2x+y=5 in polar form. By following the example in the book I get:
1. 0 answers
2. 1,063 views
Name all the values of x that are not in the domain of f(x)=2-x^2/x+5.Answer: x= -5 2)Find the minimum value of f(x,y)=2x-y+2
1. 0 answers
2. 415 views
Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of
1. 0 answers
2. 1,021 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. 0 answers
2. 676 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. 0 answers
2. 485 views
Determine the value of w so that the line whose equation is 5x-2y=-w passes through the point at (-1,3).Answer: w=11
1. 1 answer
2. 498 views
Find the critical point of the function y=-2(x-1)^2-3. Then, determine whether the point represents a maximum, a minimum, or a
1. 1 answer
2. 448 views
Find the slope of the line passing through the points at (a, a+3) and (4a, a-5).2) Together, two printers can print 7500 lines
1. 1 answer
2. 1,037 views
Name all the values of x that are not in the domain of f(x)=2-x^2/x+5.Answer: x= -5 2)Find the minimum value of f(x,y)=2x-y+2
1. 0 answers
2. 751 views
Determine whether the function f(x)[x+1] is odd, even, or neither.Answer: neither odd nor even 2)Find the least integral upper
1. 0 answers
2. 469 views
The angle of elevation from the end of the shadow to the top of the building is 63 degrees and the distance of 220 feet.1) Find
1. 1 answer
2. 1,140 views
If cot theta =0.85, find tan theta.Answer: 1.176
1. 1 answer
2. 466 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. 0 answers
2. 475 views
The volume V of a gas varies inversly as pressure P is exerted. If V is 3.5 liters when P is 5 atmospheres, find V when P is 8
1. 2 answers
2. 640 views
Which is true for the graph of f(x)= -x^3+3x-2?Answer: relative maximum at (1,0) 2) Determine between which consecutive integers
1. 0 answers
2. 698 views
Choose the statement that is true for the graph f(x) =x^3-12x.Answer: f(x) decreases for x >-2 2) Which type of critical point,
1. 1 answer
2. 1,650 views
Describe the end behavior of f(x)=2x^4-5x+1.
1. 1 answer
2. 1,499 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. 0 answers
2. 538 views
Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of
1. 0 answers
2. 548 views
Find the critical point of the function y=-2(x-1)^2-3. Then, determine whether the point represents a maximum, a minimum, or a
1. 0 answers
2. 437 views
Find the slope of the line passing through the points at (a, a+3) and (4a, a-5).2) Together, two printers can print 7500 lines
1. 0 answers
2. 536 views
Name all the values of x that are not in the domain of f(x)=2-x^2/x+5.Answer: x= -5 2)Find the minimum value of f(x,y)=2x-y+2
1. 0 answers
2. 410 views
Determine whether the function f(x)[x+1] is odd, even, or neither.Answer: neither odd nor even 2)Find the least integral upper
1. 0 answers
2. 886 views
Use the Remainder Theorem to find the remainder of (x^3-5x^2+7x+3)/(x-2). State whether the binomial is a factor of the
1. 2 answers
2. 725 views
Approximate the greatest real zero of the function g(x)=x^3-3x+1 to the nearest tenth.
1. 0 answers
2. 430 views
Write the slope-intercept form of the equation of the line that passes through the point (-5,4)and has a slope of -1.Answer:
1. 1 answer
2. 400 views
If f(x)=4x^2 and g(x)=2/x, find [g x f](x).Answer: -1/2x^2 2) Are f(x)=1/2x+5 and g(x)=2x-5 inverses of each other? Answer: no
1. 1 answer
2. 373 views
Is the graph of x^2/9-y^2/25 symmetric with respect to the x-axis, y-axis, neither axis, or both axes. Explain.
1. 1 answer
2. 469 views
Write the polynomial equation of least degree that has the roots: -3i, 3i, i, and -i.Answer:
1. 1 answer
2. 856 views
The directions are to use affirmative tu commands to fix the following:1) el perro tiene hambre 2) hay mucha basura en la cocina
1. 2 answers
2. 996 views
Which of the following results in the graph of f(x)=x^2 being expanded vertically by a factor of 3 and reflected over the
1. 2 answers
2. 3,854 views
The graph of the equation y=x^3-x is symmetric with respect to which of the following?a) the x-axis b) the y-axis c) the origin
1. 2 answers
2. 2,925 views
A farmer can plant a combination of two different crops on 20 acres of land. Seed costs $120 per acre for crop A and $200 per
1. 1 answer
2. 974 views
I am confused as to when I should use la or el. For example:Mi televisor es peor que el televisor de mi hermano. Es
1. 6 answers
2. 1,204 views
How does my paper sound and ideas what I cando to make it sound better thanks so much for your help :)Cervical Cancer A.
1. 1 answer
2. 529 views
Please check this for me thanks I have to do paper on cervical cancer thanks againCervical Cancer A. Understanding Cancer Cancer
1. 0 answers
2. 562 views
Please check this for me thanks I have to do paper on cervical cancer thanks againCervical Cancer A. Understanding Cancer Cancer
1. 1 answer
2. 1,055 views
I must write a prose satire aimed at changing the behavior or attitude of your audience. I cannot think of any topic to write
1. 2 answers
2. 1,165 views
Find DE if matrix D= Row 1= -2,4,6 and ROW 2= 5,-7,1 and matrix E= Row 1= 1,-2Row 2= 0,-4, and Row 3= -3,4 WORK:
1. 1 answer
2. 602 views
Find DE if D=[-2 4 6] and E=[1 -2][5 -7 1] [0 4] [-3 4] I followed the example in the book on how to multiply matrices and one I
1. 2 answers
2. 456 views
Which system is inconsistent?A) y=0.5x x-2y=1 B) 2x-y=8 4x+y=5 C) x+y=0 2x=y D) y= -1 x=2 Answer: A Thanks
1. 1 answer
2. 381 views
Write the standard form of the equation of the line that passes through (-3,7) and is perpendicular to the line with the
1. 1 answer
2. 464 views
1) Write the standard form of the equation of the line parallel to the graph of 2y-6=0 and passing through B(4,-1).Answer: y+1=0
1. 1 answer
2. 914 views
Write an equation in standard form for a line with an x-intercept of 2 and a y-intercept of 5.I cannot find any examples of how
1. 2 answers
2. 1,908 views
an invoice for office supplies is shownbelow. Based on the informstion in the invoice calculate the invoice total Note: Shipping
1. 1 answer
2. 564 views
what is the dollar value of ending inventory if there were 17,000 units on hand on December 31?January 1 beginning inventory
1. 0 answers
2. 608 views
please check my answer thanksJanet took a standardized test that had 328 questions. She answered 75 %of the questions. How many
1. 1 answer
2. 672 views
please check my answer thanksEquation 9(2x-18) = 36 18 -162 = 36 18 x 162 =36 + 162 + 162 18 x = 198 18x 198 18 =18
1. 4 answers
2. 740 views