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1. ### Find the point of intersection. r=(1,2,-3)+t(1,-1,1) and r=(5,-2,-3)+s(2,-2,-2)?

r = (1, 2, -3) + t(1, -1 ,1) = (5, -2, -3) + s(2, -2, -2) The point of intersection satisfies both equations for r, and for each coordinate. x: 1 + t = 5 + 2s z: -3 + t = - 3 – 2s add those 4 + 0 = 8...

4 Answers · Science & Mathematics · 12/05/2019

2. ### Find Radius r of Cylinder?

188.5 = 2 * pi * r^2 + 2 * pi * r * 7 188.5 = 2 * pi * r^2 + 14 * pi * r 377 = 4 * pi * r^2 + 28 * pi * r 0 = 4pi * r^2 + 28pi * r - 377 r = (-28pi +/- sqrt(784 * pi^2 + 4 * 4 * 377 * pi)) / (8...

1 Answers · Science & Mathematics · 18/09/2019

3. ### find the area of the part of the circle r=9sinθ+cosθ in the fourth quadrant?

... coordinates. Multiply both sides by r to get r² = 9r sin θ + r cos θ x² + y² = 9y + x x²...

4 Answers · Science & Mathematics · 18/05/2019

4. ### Let R be the relation on Z defined by mRn if and only if mn>0 or m=n=0 1 Prove R is an equivalence relation 2 How many distinct equivalence?

... the conventional use of Z, denoting the set of integers. R is reflexive, because for any integer a, either a^2 > 0 or a = 0 and therefore...

1 Answers · Science & Mathematics · 17/09/2019

5. ### Using polar coordinates, evaluate the integral ∫∫Rsin(x2+y2)dA where R is the region 16≤x2+y2≤25.CAN U HELP ME PLS?

... + y² ≤ 25 16 ≤ r² ≤ 25 4 ≤ r ≤ 5 ∫∫ { sin( x² + y² ) dA, where R...(16) - ½cos(25) ∴ ∫(θ=0 to 2π) ∫(r=4 to 5 ) r * sin( r² ) dr dθ = ∫(θ=0 to 2π...

2 Answers · Science & Mathematics · 13/05/2019

6. ### one fourth the sum of r and 10 is equal to 4 less than r?

(1/4)(r+10) = r-4 r + 10 = 4r - 16 3r = 26 r = 26/3

3 Answers · Science & Mathematics · 11/09/2019

7. ### Find the area between the inner and outer loops of the curve r=2cos(theta)-1.?

...the top part and will multiply by 2 Area of smaller semi-loop = ∫(1/2)r^2 dθ [0,π/3] = ∫(1/2)[2cosθ-1]^2 dθ [0,π/3] = (1/2)∫[4cos^2(θ)-4cosθ...

1 Answers · Science & Mathematics · 08/05/2019

8. ### 2.1.3 Solve for x 2.2 Make Rs the subject of the formula?

...42 (21/4) * 2^(x) = 42 2^x = 42 * 4 / 21 2^x = 2 * 4 2^x = 8 x = 3 V = R / (R[s] + r) * V[dc] V / (R * V[dc]) = 1 / (R...

3 Answers · Science & Mathematics · 23/02/2020

9. ### Determine the CM of a machine part that is a uniform cone of height h and radius R, Figure.?

...π r² dz) / ∫ (π r² dz) Using similar triangles: r / R = z / h r = R/h z Substituting: CM = ∫₀ʰ...

1 Answers · Science & Mathematics · 04/05/2019

10. ### What is the value of tan r? Round to the nearest decimal places if needed?

tan R = 20/21 = 0.952380... ≈ 0.9524

3 Answers · Science & Mathematics · 04/05/2019