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Why is the formula sqrt (x1-x2) ^2 + (y1-y2) ^2 used instead of sqrt (x2-x1) ^2+ (y2-y1) ^2 to find distance between 2 points?Read more

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One solution is x=-3 because you should have (x+3)(x^2+9)=0 and if x=-3 then you have (0)(a quantity) or the zero product property.Read more

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3*(-2) = -3*2 and -3+2 = -1, the coefficient of x. So, 3x 2 -x-2 = 3x 2 - 3x + 2x-2 = 3x(x-1) + 2(x-1)Read more

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2x +3y = 5. 3y = -2x +5. y = (-2/3)x + 5/3 in slope intercept form with slope =-2/3 and intercept = 5/3. Upvote • 0 Downvote. Add comment.Read more

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Subtracting 7 from both sides: (x + 7) - 7 = 1 - 7 gives x = -6. This is the only solution to this equation.Read more

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sinx = 1/2 has two answers (one in the 1st quadrant and one in the 2nd quadrant) because sine is positive in the 1st and 2nd quadrants.Read more

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Use the double angle identity sin(2x) = 2sin(x)cos(x) and substitute yielding: 2sin(x)cos(x) + cos(x) = 0 and then factor out cos(x) to get:.Read more

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Thorvald B. asked • 07/10/16. Find all solutions of the equation sin(2x)=-1/2. From a chapter on Trigonometric Equations.Read more

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For the factoring, I was asked for all integers x such that x^4+4 was prime. The solution was to factor it in the same way as the above: x^4+4=x ...Read more

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Simplify the following -(2/5)^-2.

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In equation X+2y =5,if you=0 then write the value of x.

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For positive acute angles A and B, it is known that cosA=60/61 and tanB=12/35. Find the value of cos(A−B) in simplest form.Read more

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12 Jan 2023 — Start with the equation that's given: 3x + y = -5. Subtract 3x from both sides: 3x - 3x + y = -5 - 3x. Cancel like terms on the lefthand side: y Read more

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For the line 5x-y=2, the slope, m, is (-A/B)=(-5/(-1))=5 and the y-intercept is the point (0,2/(-1)), or (0,-2).Read more

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either x = 0 and/or x+7 = 0. Solving these you find that x=0 and/or x = -7 to end up with 0=0.Read more

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The equation is x = 4. I will create a table of points for this line and then you can graph it to see that it is a vertical ...Read more

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tan x = 1 means x = pi/4 in the first quadrant; tan x = -1 means x = 3pi/4 in the second quadrant.Read more

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You will solve it, as follows: 1) calculate slope from the given two points. 2) using one of those points (I suggest (0,4)), substitute appropriately into the ...Read more

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when is tanx+cotx

tan(x) and cot(x) are always positive (or at least zero) in the first and third quadrants, or, from [0,Π/2] and [Π,3Π/2], then their sum will be greater than 1 ...Read more

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Zn is, in fact, a transition metal, but it is one of the few that have only a single valence (Sc and Ag are other examples). So, the correct name for Zn(OH)2 ...Read more

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Al(NO3)3(aq) + 3NaOH(aq) ==> Al(OH)3(s) + 3NaNO3(aq) ... balanced molecular equation. Al3+(aq) + 3NO3-(aq) + 3Na+(aq) + 3OH-(aq) ...Read more

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3 Apr 2013 — This problem can be solved in a much simpler way. sin(-2x) = cos(3x) => cos(pi/2 + 2x) = cos(3x) pi/2 + 2x = 3x => x = 0.5pi orRead more

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So quite simple we multiply one-fifth by 300. How do we do that? Look at it this way: (1/5) * (300/1). When you write this in fraction form on a ...Read more

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0 = sin^2 - cos^2 = sin^2 - ( 1 - sin^2) = sin^2 - 1 + sin^2 = 2sin^2 - 1 sin^2 = 1/2 sin = +or- sqrt(2)/2 X=Read more

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5(x+9) = 5x + 45 is the application of the distributive property. Upvote • 0 Downvote. Add comment. More. Report. Still looking for help ...Read more

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The slope is -1/2, so come down 1 from (0,5) and go to the right 2, so that point would be (2,4), right? Join those 2 points up, ...Read more

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Substitute x=-4y into 3x+2y=20. 3(-4y) + 2y = 20. This will allow you to solve for y.Read more

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sin3x - sinx = 0. sinx(sin2x - 1) = 0. sinx(sinx - 1)(sinx + 1) = 0. sinx = 0, sinx = 1, or sinx = -1. Solutions in the interval [0, 2π] are 0 ...Read more

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10 Nov 2021 — 3^x = 81 = 9^2 = (3^2)^2 = 3^4 3^x = 3^4 x = 4 everything is identical on both sides of the equation, except x and 4, so set them equal.Read more

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12 X12 ----- 24 - we know this is 24 because we multiplied the 2 on the bottom right to both of the top numbers.Read more

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(x+y)3 expanded has 4 terms, 1 more than the exponent, x3 x2y xy2 and y3 x is decreasing from 3 to 0 from left to right, as y increases from 0 ...Read more

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No, it's a linear equation whose graph is on the number line not on the coordinate axes. To be able to be graphed on the axes, ...Read more

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1/n, break the numerator and denominator into separate parts. As n—>infinity, the numerator remains unchanged. So we need only to worry about ...Read more

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Greetings! Lets solve this shall we ? The statement A+B+C = 180 implies A = B = C = 60°. Then,. = sin(2*60) - sin(2*60) - sin(2*60).Read more

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Ask your question to receive an answer from one of the 65000 expert tutors available for 1-on-1 hire.

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If the graph of y = cosx is translated π/2 units to the right, we get the graph of y = sinx. This means that the equation cos(x - π/2) = sinx is an identity.Read more

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25 percent can also be 1/4th of something or simply divide by 4. Percent means per 100, as there are 100 cents in one dollar and one hundred years in a century.Read more

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Let's begin by writing out the expression we need to simplify: (2x - 3)^2. First, we know that squaring an expression is the equivalent of multiplying the ...Read more

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The answer is as follows: -8x - 12. Please note what we did here: We multiplied each term inside the parentheses by the term outside of the parentheses.Read more

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Essentially the goal is to simplify 25^(3/2), and leave the answer as a fraction. I always end up with a whole number.Read more

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5 Nov 2012 — This problem is x divided by 5 equals negative 7. The x is divided by 5, and we have to do the opposite, that is, we have to multiply by 5.Read more

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3x=27 is the same as 3 times x equals 27. Divide both sides by 3. 3x/3=27/3. Since 3/3 equals one, you can leave X by itself. 27/3 equals 9. 9 times 3 equals ...Read more

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sinx=1/4 has an angle in the 1st or 2nd quadrant, where x could be an infinite number of different values, positive or negative.Read more

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AC=AB+BC definition of between. AB+BC=BD ?? BD=BC+CD ?? AB+BC=BC+CD addition property of equality. AB=CD ?? CD=AB ?? CD≅AB. Follow • 2. Add ...Read more

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Given the following reaction, Cr(OH)3 + NaOH = NaCrO2 + 2H2O , how many grams of NaCrO2 can be produced from 83.3 g of Cr(OH)3?

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Solve for all values of 2sinx-1=0. in terms of pi. (show work) where 0≤x<2π. Follow • 2. Add comment.Read more

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Josue T. asked • 04/09/18 ... Josue T. asked • 04/09/18 ... the sum of a number x and 4 equals 12 ... write the word sentence as a equation and then solve.Read more

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For example, if you knew that y=-2x+5 and x-3y=0, then you could substitute y in the second equation for -2x+5 and then solve for x using ...Read more

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sin 2 x + sin x = 0 sin x (sin x + 1) = 0 Use the zero-product rule from Algebra 2 to solve. Upvote • 0 DownvoteRead more

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