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Ella Toboláková

Ella T.

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Explain this statement in your own words and give an example. The properties of the substances around us depend on the structure of the particles that compose them.

Explain this statement in your own words and give an example. The properties of the substances around us depend on the structure of the particles that compose them.

Chemistry: Structure and Properties

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ANSWERED

Yujie Wang verified

Numerade educator

27. Using the graph below, identify the viable solutions. (Note that the shaded area is the feasible region for this graph.) Select all that apply. (30,10) (10,50) (10,30) (40,0)

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ANSWERED

Manisha Sarker verified

Numerade educator

26. Subtract the matrices given below. Which of the following images shows the difference of the matrices? left[egin{array}{cc}6 & -2 \ 4 & 5 \ -2 & 7 \ 8 & -6end{array} ight] - left[egin{array}{cc}-5 & 6 \ 4 & -3 \ 8 & 4 \ -2 & 7end{array} ight] = left[egin{array}{cc}11 & -8 \ 0 & 8 \ -10 & 3 \ 10 & -13end{array} ight] left[egin{array}{cc}11 & 8 \ 0 & -8 \ -10 & -3 \ 10 & 13end{array} ight] The matrices cannot be subtracted because they do not have the same dimensions. left[egin{array}{cc}1 & 8 \ 0 & 8 \ 10 & 3 \ -10 & -13end{array} ight]

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Supratim Pal verified

Numerade educator

4. Add the matrices given below. Which of the following images shows the sum of the matrices? [3 -4; 6 2] + [-7 6; -3 5] = ? [-10 -2; -9 7] ? The matrices cannot be added because they do not have the same dimensions. ? [-4 2; 3 7] ? [10 -10; 9 -3]

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Khushbu Rani verified

Numerade educator

3. Which of the following graphs shows the solution to the system of linear inequalities below? -3x + y < 1 5y > 10x

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ANSWERED

Eduard Sanchez verified

Numerade educator

Multiply the matrix by the scalar, as shown below. Which of the following images shows the product of the matrix by the scalar? 4[egin{bmatrix} 7 & 8 \ -6 & 3 \ 4 & -5 end{bmatrix}] [egin{bmatrix} 28 & -32 \ -24 & -12 \ 16 & -20 end{bmatrix}] [egin{bmatrix} 11 & 12 \ -2 & 12 \ 8 & -1 end{bmatrix}] [egin{bmatrix} 28 & 32 \ -24 & 12 \ 16 & -20 end{bmatrix}] [egin{bmatrix} 28 & 32 \ 24 & 12 \ 16 & 20 end{bmatrix}]

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Anand Jangid verified

Numerade educator

Melissa graphed the function y = 1/2x + 2. Use a graphing calculator, an online graphing tool, or a graph you create by hand to determine which of the following features will be included on Melissa's graph? Select all that apply. a negative slope a negative x-intercept a positive y-intercept a positive x-intercept

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Melissa Munoz verified

Numerade educator

21. Match each function with the correct domain. 1. k(x) = (2x - 3)^2 / (x - 3) 2. f(x) = sqrt(x - 11) 3. g(x) = sqrt(x - 6) 4. k(x) = (3x^2 + 2x) / (x - 1) a. x >= 6 b. x >= 11 c. all real numbers except 3 d. all real numbers except 1

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ANSWERED

Manisha Sarker verified

Numerade educator

16. Which of the following situations could be represented by the expression, 1,400-75x? A computer programming program must spend $1,400 to operate. If each student pays $75 to be in the program, write an algebraic expression to show how much money the program will earn if x number of students enroll. A computer programming program has $1,400 to fund student scholarships. If each scholarship offered is $75, write an algebraic expression to show how many students can receive scholarships. A computer programming program made a profit of $1,400 last month. If the program earns $75 profit per student in the program, write an algebraic expression to show how much money the program will earn if x number of students enroll. A computer programming program has $1,400 to fund student scholarships. If each scholarship offered is $75, write an algebraic expression to show how much money the program has left if x number of students have already received scholarships.

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Jason Horton verified

Numerade educator

8. Which of the following graphs shows the solution of y < -2/5x + 6?

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ANSWERED

Jason Horton verified

Numerade educator

7. Which of the following graphs shows the solution of x+3y > 18?

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