6,964 Answered Questions for the topic mathematics
04/17/21
Write the system of linear equations represented by the augmented matrix. (Use the variables x, y, z, and w, if applicable.)
7 -5 -148 3 -16= ________ ________
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State the elementary row operations applied to the first augmented matrix A to transform it to its row-equivalent matrix B.
A =
1
−2
7
6
4
1
B =
1
−2
7
0
16
−41
A: 2R2 + R1B: 5R2 - 15R1C: (-6)R1 + R2D: Interchange R1 and R2E: None of these
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Write the matrix in row-echelon form. (Note: Row-echelon forms are not unique.)
1 2 -1 63 7 -5 5-2 -1 -3 2= ____ _____ ____ ____ ____ _____ ____ ____ ____ _____ ____ ____
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04/17/21
Use matrices to solve the system of eqs (if possible). Use Gauss-Jordan elimination. (If no solution, enter NO SOLUTION. If system is dependent, set z = a and solve for x and y in terms of a.)
2x+2y-z= 14x-3y+z= -30-x+y =12(x,y,z) = ______
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Use matrices and Gauss-Jordan elimination to solve systems of linear equations
The matrix
1
0
4
0
0
1
−6
−1
0
0
−5
5
can be reduced in the row echelon form
1
0
0
a
0
1
0
b
0
0
1
c
where a, b, and c are real numbers. Find a. (Enter an exact number.)a = ____
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What is the center and radius of the circle represented by the equation (x – 9)2 + (y + 2)2 = 4?
A.center: (–9, 2), radius: 4B. center: (–9, 2), radius: 16C. center: (9, –2), radius: 4D. center: (9, –2), radius: 2
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The vertices of GHJK are G(–1, 0), H(1, 6), J(5, 6), and K(5, 2). What is the most precise classification of GHJK?
A.quadrilateralB.trapezoidC.parallelogramD.kite
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04/16/21
Which statement is true? Select all that apply.
Which statement is true? Select all that apply.A. AB=CDB. AB=BCC. AD=BC+2aD. 𝐴𝐵^- ll CD^-E. AD^- ll BC^-(^- means the letters have a line above them)
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04/16/21
Rays HG and HJ are tangent to ⊙Q. What is 𝑚𝐺𝐾𝐽⏜ ?
Rays HG and HJ are tangent to ⊙Q. What is 𝑚𝐺𝐾𝐽⏜ ? = ˚
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04/16/21
What is RS? Round to the nearest tenth.
What is RS? Round to the nearest tenth.
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04/16/21
What are the coordinates of the vertices of D(3, A) (△ABC) for A(0, 4), B(–2, 5), and C(3, 7)?
A.)A′(0, 12), B′(−6, 15), C′(9, 21)B.)A′(0, 15), B′(−6, 18), C′(9, 24)C.)A′(0, 9), B′(−6, 12), C′(9, 18)D.)A′(0, 4), B′(−6, 7), C′(9, 13)
04/16/21
Problem on probability
Three cards are selected at random without replacement from a deck which contains 3 red, 3blue, 3 green, and 3 black cards. Give a sample space for this experiment and define the events:A: all the...
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Mathematics
04/16/21
What is the suitable unit for the volume of a classroom
04/16/21
Minimum Distance for Calculus
A wandering albatross is sitting at the origin (0,0,0). What is the minimum distance between the albatross and a clothesline with equation r(vector)= [1,4,1] + s [-1,2,3] , s is every real number...
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Imaginary FOILED? What is i -1 squared?
(i-1)*(i-1) =-1 -2i +i
04/16/21
Calculus Planes
Jamila is designing a computer game where two planes need to be aligned so they are perpendicular to each other. Help Jamila determine and value of k such that the planes 2x-ky+2kz-4=0 and 3x+y-z=2...
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Optimization Problem
A newspaper page has top and bottom margins that are 6 cm wide and side margins that are 4 cm wide. If the printed area on the page is 2,400 cm2, find the dimensions of the page so that it has the...
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Need help solving this one
Graph the function. Graph the leftmost point and three additional pointsf(x)=(sqrt x)+4
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Mathematics
04/15/21
Write the equation of the line that passes through the points (−4,3) and (-9,3). Put your answer in fully reduced point-slope form, unless it is a vertical or horizontal line.
04/15/21
DIFFERENTIAL EQUATION
Task №1Find the general and particle solutions of the following differential equationa. differential equation of the first order with the separable variables-4x • y' + 5y=0, y=1,x=1b. Linear...
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Mathematics
04/15/21
How do I answer this ?
In New York City, the cost of riding in a taxi is $2.55 per passenger and an additional $1.22 per mile driven. A group of friends took a ride in the taxi to see the Statue of Liberty and paid a...
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Mathematics
04/15/21
how do I write this as an equation
Baltimore County Department of Natural Resources is planting trees in local parks to support the environment. Maple trees cost $50 each and oak trees cost $25 each. They spend exactly $800 for this...
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Need help with this one professor did a horrible job at explaining, f(x)=sqrt x+4
Graph the function. Graph the leftmost point and three additional pointsf(x)=sqrt x+4
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Teacher gives test worth 125 points and has 50 questions multiple choice is 2 points and word problems are worth 3. What’s the best system to represents this scenario
X+y=50 and 2x+3y=125,x+y=125 and 2x-3y=50,2x+x=50 and y+3y=125,2x-3y=125 and x-y=125
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Mathematics
04/15/21
how do find the answer and the equation
Fred bought a soft drink for 2 dollars and 8 candy bars. He spent a total of 34 dollars. How much did each candy bar cost?Let c represent the cost of the candy bars.Type your equation into the math...
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