Questions and answers by

Lucy

Questions (642)

What were the main causes of the American Civil War?I have - Slavery States rights v.s. federal law Economic issues (tariffs)
1. 1 answer
2. 718 views
Find the exact solution(s) of the system: (x^2/4)-y^2=1 and x=y^2+1Answer:(4,sqrt3),(4,-sqrt3) 2)Write an equation for an
1. 1 answer
2. 465 views
1)Find the exact value of sin 165 degrees.Answer: (sqrt6 + sqrt2)/4 2) Simplify: (4m/5n^2)- (n/2m) Answer: (8m^2-5n^3)/10n^2m
1. 1 answer
2. 1,317 views
How do I do an embedded APA Citation for a picture?I need to put the citation underneath a picture within my report. Thanks Lucy
1. 1 answer
2. 538 views
Why is there likely to be fewer plants growing in the shaded ground under a tree than elsewhere?
1. 1 answer
2. 699 views
I have to design an experiment to measure the speed of sound.We're given a tape measure and a stopwatch. The temperature of the
1. 0 answers
2. 513 views
In which of the following poems does the tone change from stanza to stanza?1) "Storm Ending" 2) "We Wear the Mask" 3) "Any Human
1. 1 answer
2. 577 views
Find the exact solution(s) of the system: (x^2/4)-y^2=1 and x=y^2+1Answer:(4,sqrt3),(4,-sqrt3) 2)Write an equation for an
1. 0 answers
2. 456 views
1)Find the exact value of sin 165 degrees.Answer: (sqrt6 + sqrt2)/4 2) Simplify: (4m/5n^2)- (n/2m) Answer: (8m^2-5n^3)/10n^2m
1. 1 answer
2. 1,480 views
1) Find the exact value of cos 105 degrees by using a half-angle formula.2)Find the solution of sin 2theta = cos theta if 0
1. 1 answer
2. 1,765 views
Find the exact value of sin(theta/2) if cos theta = 2/3 and 270 degrees<theta<360 degrees.Answer: sqrt6/6
1. 1 answer
2. 870 views
Find the exact value of cos 375 degrees.Answer: (sqrt6 + sqrt2)/4 Is this correct?
1. 1 answer
2. 1,053 views
Which of the following expressions are not equal to 1?A) sin^2 theta + cot^2 theta sin^2 theta B) (sin^2 theta/1-cos theta)-cos
1. 1 answer
2. 994 views
Find cos theta if sin theta = 3/5 and 90 degrees<theta<180 degrees.Is the answer -sqrt34/5? Appreciate you checking my anwers.
1. 1 answer
2. 1,222 views
Find sec theta if tan theta =1/4 and 180 degrees<theta<270 degrees.Answer: sqrt17/4 Thanks
1. 1 answer
2. 561 views
Find the exact value of: cos315 degrees.Is the answer sqrt of 2/2? Thanks
1. 1 answer
2. 462 views
Verify that (sec theta/sin theta)(cot theta/csc theta) = csc theta is an identity.Thanks
1. 1 answer
2. 1,133 views
State the phase shift of y=cos(theta-[pi/3]). Then graph the function.I know that you cannot graph on this site but how do I
1. 2 answers
2. 699 views
An insect population P in a certain area fluctuates with the seasons. It is estimated that P= 17,000 + 4500sin (pi)(t)/52, where
1. 2 answers
2. 753 views
What is the answer to(sin45) / (cos45)?
1. 1 answer
2. 605 views
Trigonometry identities are so hard...I need some help proving these identities: *Oh, and I'm only in grade 11, so the
1. 5 answers
2. 746 views
What is "constitutional power?"I have to write a response to this statement (either agreeing/disagreeing): "The Prime Minister
1. 4 answers
2. 509 views
Find the standard deviation of the data set to the nearest tenth:(21, 13, 18, 16, 13, 35, 12, 8, 15) Answer: 16.8 thanks
1. 1 answer
2. 628 views
Find the exact solution to 6x^2+1= -8x by using the Quadratic Formula.Answer: -4 +/- sqrt 10 2)Which describes the number and
1. 1 answer
2. 1,271 views
Simplify: (y^2+y-20)/(y^2-2y-8)Answer: y+5/y+2 2)Simplify: (1+i)/(2-i) Answer: 1/5+3/5 i 3) Solve 3x^2-8x+4=0 by graphing. If
1. 1 answer
2. 542 views
1) Write an equation of the line that passes through (9,6) and is perpendicular to the line whose equation is y=-1/3x+7.Answer:
1. 1 answer
2. 516 views
Solve y= ARCsin1/2My answer is pi/6 Is this right?
1. 1 answer
2. 306 views
Find the value of tan[tan^-1 1/2]My answer is 1/2. Is this correct?
1. 1 answer
2. 329 views
Write the equation siny=x in the form of an inverse function.Answer: x=Sin^-1y Thanks
1. 1 answer
2. 465 views
How do you find the cotangent of an angle?My problem is: Find the exact value of cot(-315degrees). I don't know how to do this.
1. 1 answer
2. 450 views
1) Find the exact value of cos theta if the terminal side of theta in standard position contains the point (6,-8).Answer: 3/5 2)
1. 4 answers
2. 712 views
1)Rewrite 5pi/4 radians in degree measure.Answer: 225 2) Which angle is coterminal with a -400 degree angle in standard
1. 1 answer
2. 652 views
What's the difference between heat capacity and specific heat capacity?What units are each measured in?
1. 1 answer
2. 532 views
During a sale, 1/6 of the CD prices are reduced. Find the probability that 2 of 4 randomly-selected CDs have reduced prices.How
1. 1 answer
2. 843 views
In an election poll, 56% of voters chose a certain candidate. find the margin of sampling error.So far I have:
1. 2 answers
2. 666 views
The problem is:Prove that the statement 1/5+1/5^2+1/5^3+...1/5^n=1/4(1-1/5^n) is true for all positive integers n. Write your
1. 1 answer
2. 455 views
The problem is:Prove that the statement 1/5+1/5^2+1/5^3+...1/5^n=1/4(1-1/5^n) is true for all positive integers n. Write your
1. 0 answers
2. 428 views
How can I tell whether a function will be reflected in the x-axis or y-axis and whether it will be horizontally and vertically
1. 2 answers
2. 483 views
Two cards are drawn from a standard deck of cards. Find the probability that a king or a red card is drawn.Work: 4/52 +
1. 1 answer
2. 428 views
1) A red die and a blue die are tossed. What is the probability that the red die shows a 3 and the blue die shows a number
1. 1 answer
2. 1,767 views
Simplify:x^5*x^pi Answer: x^8.14 Is this correct? I know that this is a repost of a question I posted yesterday, and I
1. 1 answer
2. 627 views
last 2 for tonightExpress log6(19) in terms of common logarithms. Then approximate its value to four decimal places. Answer:
1. 2 answers
2. 753 views
Log6(6^9)=???Answer: 9 Ine^-3x=??? Answer: -3x Use log5(2) = 0.4307 and log5(3) = 0.6826 to approximate the value of log5(12)
1. 1 answer
2. 1,213 views
Solve, round to 4 decimal places if necessary:3.9^m-4=10.21 Answer: (m-4)In(3.9)=In(10.21) m(In3.9)-4(In3.9)=In(10.21)
1. 1 answer
2. 476 views
Solve, round to four decimal places if necessary:log4(x-9)=2 Answer: x-9=4^2 x-9=16 x=11 log4(z)+log4(z-3)=1 Answer: z+z-3=1
1. 2 answers
2. 797 views
Simplify:(x^5)(x^pi) Answer: x^5+pi x=8.14 Round to 4 decimal places if necessary: (1/5)^t-2 = 125 (5^-1)^t-2=125 5^-t+2=5^3
1. 1 answer
2. 424 views
Use log5(2)=0.4307 and log5(3)=0.6826 to approximate the value of log5=54.According to the example in my book I would divide
1. 3 answers
2. 7,629 views
Solve log2(7x-3)>= log2(x+12)My work: 6x=15 x=15/6 x-5/2 so my answer would be: x>= 5/2 Is this correct?
1. 1 answer
2. 1,175 views
Write the equation log243(81)=4/5 in exponential form.My answer is 243^4/5=81. Evaluate 9^log9(54). My answer is 6. Are these
1. 2 answers
2. 2,056 views
Please check the following:Solve log4(m-3)+ log4(m+3) =2 Answer: 1 Solve 6^3n=43^5n-4 Answer: 1.1202 Solve 5^2x+1>=50
1. 1 answer
2. 1,494 views
I cannot figure out how to work this one. I have tried working it like the example in the book but cannot come up with one of
1. 0 answers
2. 512 views
Please check answers:Use the equation of the exponential function whose graph passes through the points (0,-2) and (2,-50) to
1. 1 answer
2. 1,646 views
I need help with scales and converting them to real-life measurements.So, there's this line on the page that measures 1 metre in
1. 0 answers
2. 466 views
Solve:(1/81)^t=243^t-2 The book states to get the same base but I don't understand. Thanks for any help.
1. 1 answer
2. 1,027 views
Simplify: (s^7�ã11)/(s�ã11)I think it is s^8�ã11 Is this correct??
1. 1 answer
2. 444 views
Use the equation of the exponential function whose graph passes through the points (0,-2) and (2,-50) to find the value of y
1. 1 answer
2. 2,135 views
If g(x) = 3x-8, find g[g(-4)].3(-4)-8 -12-8=-20 Is this correct? Thanks
1. 1 answer
2. 384 views
Which describes the number and type of roots of the equation x^2 -625=0?A. 1 real root, 1 imaginary root B. 2 real roots, 2
1. 1 answer
2. 1,609 views
Find the coordinates of the vertices of the figures formed by:y<=x+2, x+y <=6, and y>= -2 A. (0,0), (2,4), (8,-2) B. (-4,-2),
1. 0 answers
2. 531 views
Use the equation of the exponential function whose graph passes through the points (0,-2) and (2,-50) to find the value of y
1. 0 answers
2. 589 views
Graph: x^2/9 - (y+2)^2/9 = 1I do not have any points to graph for this equation. Any suggestions? Thanks.
1. 1 answer
2. 343 views
Graph 16x^2 + 9y^2 = 144I know that you cannot graph this but the graph of this equation should be a circle I think. I have
1. 4 answers
2. 839 views
What does impartial mean?
1. 1 answer
2. 374 views
Thomas can do a job in 4 hours. Julia can do the same job in 6 hours. How many hours will it take the two of them to do the job
1. 4 answers
2. 1,138 views
Solve: 4-1/b<3/b
1. 1 answer
2. 322 views
Simplify: 7/m-6 - m/6-mAnswer: m-7/m-6 Is this correct? Thanks
1. 1 answer
2. 330 views
Lately, for the past couple of tests I've written, I suddenly blank out and can't recall any information...Normally I've been
1. 2 answers
2. 816 views
What is the best way to study for a math test?Also, what is the best/most efficient way to write a math test? The format of my
1. 3 answers
2. 1,405 views
What are some of the differences between the creation stories of the Native groups and the creation stories of the Europeans who
1. 4 answers
2. 685 views
Write an equation for an ellipse if the endpoints of the major axis are at (1,6) and (1,-6) and the endpoints of the minor axis
1. 4 answers
2. 624 views
Write an equation for the parabola with focus (1,3) and vertex (0,3).I cannot find any example in my book that works a problem
1. 1 answer
2. 1,317 views
Determine the equation of any vertical asymptotes and the value of x for any holes in the graph: f(x)= x^2-11x+18/x-2.I factored
1. 2 answers
2. 1,384 views
Simplify:d/d^2-9 + 5/2d+6 I got as far as d/(d+3)(d-3) + 5/2(d+3) but do not know how to further simplify. Thanks for any help
1. 1 answer
2. 434 views
Simplify:4xy^3/z^2 divided by (8x^2y/z^3)^2 I came up with the following: 2.2.x.y.y.y.z.z.z.z.z/z.z.z2.2.16.x.x.x.x.y.y
1. 1 answer
2. 1,119 views
Write an equation for the ellipse with end points of the major axis at (7,1) and (-7,1) and end points of the minor axis at
1. 1 answer
2. 621 views
Write 36x^2-360x-25y^2-100y=100 in standard form. Then state whether the graphs of the equation is a parabola, circle, ellipse,
1. 3 answers
2. 821 views
I have to compare and contrast three types of tires, and relate them to physics.I've chosen: <li> Racing tires <li> Winter tires
1. 1 answer
2. 796 views
The question simply states-solve.-x^4+200=102x^2 I rearranged the equation so that I have x^-102x^2+200=0 Since I cannot factor
1. 4 answers
2. 695 views
State the number of positive real zeros, negative real zeros, and imaginary zeros for g(x)= 9x3 -7x2+10x-4.Since there were 3
1. 2 answers
2. 993 views
State the possible number of imaginary zeros of g(x)= x4 + 3x3 + 7x2 - 6x - 13.I came up with the answer of 2,4 or 0. Is this
1. 1 answer
2. 1,286 views
So...The task is to evaluate the design of three types of car tires, and explain how each type differs to maximize performance.
1. 1 answer
2. 1,170 views
A ball falling from rest is located 45 m below its starting point 3.0 s later. Assuming that its acceleration is uniform, what
1. 1 answer
2. 791 views
How do I work the following problem? I cannot find an example in my book that shows how to divide when there are two variables
1. 1 answer
2. 915 views
The problem is 5x to the 3rd times (7x)squared.I multiplied (7x)(7x) first and got x squared + 14x + 49. Then I multiplied each
1. 1 answer
2. 601 views
The problem states: Saturn is approximately 1.4x 10 to the 9th power kilometers from the Sun. If light travels at approx. 3.0 x
1. 1 answer
2. 858 views
My assignment is to write an exlpication of a peom by emily dickinson. The poem is:Hope is the thing with feathers That perches
1. 2 answers
2. 748 views
Why do lungs feel spongy?Is it because they contain alveoli...?
1. 1 answer
2. 509 views
Two negatively-charged bodies with-5.4e-5 C are 0.20 m from each other. What force acts on each particle? F=kqq/d^2
1. 2 answers
2. 1,520 views
The problem simply is this:Evaluate: 12 5 -2 -3 0 1 -5 4 2 These figures are in matrix form. I don't understand what it is I am
1. 3 answers
2. 461 views
A furniture company displays bedroom sets which require 21 square meters of space and living room sets which require 42 square
1. 3 answers
2. 917 views
Use two ordered pairs to write a prediction equation. Then using your prediction equation to predict the number of comic books
1. 2 answers
2. 2,001 views
Solve: 3+2(1-x) >6 or 2x+14 <=8. Graph the solution set on a number line.When I solved the equations for the first one I got
1. 3 answers
2. 840 views
Calculate the enthalpy change for the reaction 2C (s) + H2 (g) yield C2H2 (g) given the following reactions and their respective
1. 1 answer
2. 4,240 views
Calculate the enthalpy change for the reaction 2C + H2 yield C2H2 given the following reactions and their respective enthalpy
1. 2 answers
2. 1,303 views
How many joules are needed to heat 8.50 grams of ice from -10.0 degrees C to 25.0 degrees C?
1. 1 answer
2. 665 views
The pH of healthy lakes is around 6.0. Due to acid rain, the pH of our lakes & rivers is decreasing. At low pH levels, producers
1. 2 answers
2. 511 views
Phenolphthalein is an indicator that changes colour to pink/purple between pH 8-->10, however, neutralization occurs when pH=7.
1. 3 answers
2. 1,849 views
I added amylase to a cornstarch suspension.I thought that amylase breaks down starch into oligosaccharides. But then I heated up
1. 0 answers
2. 673 views
Compound IdentificationHow can I identify the anion of an unknown solution? - The possible cations in the solution are Ag, Al,
1. 1 answer
2. 826 views
What are some practical applications of chromatography?
1. 1 answer
2. 557 views