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Mathematics

1 answer:

Verdich [7]3 years ago

6 0

Answer:

C. (-3, 2, -1)

Step-by-step explanation:

There are two types of matrices. One is REF and the other is what makes REF simpler--RREF. We use RREF to solve for REF because it makes the solution easy to find. RREF is displayed in your problem... it means that it's already solved, so the answers are already given on the right side, which is -3,2,-1. This only works with the combination provided (with the 0s and 1s). Otherwise, you'd have to solve.

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3 years ago

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Question 3

crimeas [40]

Answer:

D = 141

Step-by-step explanation:

The given quadratic equation is

$5x^2+9x=3\\\\5x^2+9x-3=0$ .

It is required to find the value of the discriminant. The value of discriminant of any quadratic equation is given by :

$D=b^2-4ac$

Here, a = 5, b = 9 and c = -3

On plugging all the values, we get :

$D=(9)^2-4\times 5\times (-3)\\\\D=141$

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2 years ago

8x^2+1/9

umka2103 [35]

Answer:

A. Quartic

Step-by-step explanation:

I went to desmos graphing,

8x^2+1/9 (plug it in and looked at the line)

It shows a parabola,

y-intercept: (0,0.111)

"Cubic functions. Three points not in a line determine a parabola, a polynomial function of degree 2. Polynomials of degree 2 are quadratic functions. Their graphs are parabolas."

Therefore, this is a quadratic ( quartic) since the degree in this parabola is 2.

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2 years ago

Operations with Radical Expressions

lisov135 [29]

Answer: $30\sqrt{11}$