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3 years ago

Need help on this question

Mathematics

1 answer:

Lilit [14]3 years ago

8 0

That's a tricky one because x is a function of y but y isn't a function of x.

(x, x²) is a perfectly good relation.

I'm not totally sure but I'd

Answer: B

D is the other answer that may be accepted but knowing teachers, I'd go with B.

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5. Here is a rectangular prism.

vovangra [49]

Answer:

28.8sq area is the area of the prism

Step-by-step explanation:

2.4x1.5x8

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2 years ago

Solve the following system of linear equations: 3x1+6x2+6x3 = -9 -2x1–3x2-3x3 = 3 If the system has infinitely many solutions, y

choli [55]

Answer:

The set of solutions is $\{\left[\begin{array}{c}x\\y\\z\end{array}\right]=\left[\begin{array}{c}12\\-7-r\\r\end{array}\right]: \text{r is a real number} \}$

Step-by-step explanation:

The augmented matrix of the system is $\left[\begin{array}{ccccc}3&6&6&-9\\-2&-3&-3&3\end{array}\right]$ .

We will use rows operations for find the echelon form of the matrix.

In row 2 we subtract $\frac{2}{3}$ from row 1. (R2- 2/3R1) and we obtain the matrix $\left[\begin{array}{cccc}3&6&6&-9\\0&1&1&-7\end{array}\right]$
We multiply the row 1 by $\frac{1}{3}$ .

Now we solve for the unknown variables:

$x_2+x_3=-7$ , $x_2=-7-x_3$
$x_1+2x_2+2x_3=-2$ , $x_1+2(-7-x_3)+2x_3=-2$ then $x_1=12$

The system has a free variable, the the system has infinite solutions and the set of solutions is $\{\left[\begin{array}{c}x\\y\\z\end{array}\right]=\left[\begin{array}{c}12\\-7-r\\r\end{array}\right]: \text{r is a real number} \}$

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3 years ago

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Answer:

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Step-by-step explanation:

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Dmitry [639]

Answer:

a=31

Step-by-step explanation:

1/2(a-9)=11

a-9=22

a=22+9

a=31

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3 years ago

Whitch ordered pair is a solution of y>5xx-2

jenyasd209 [6]

Answer:

y = 5x - 2 (0, 2) (1, 4) (2, 7) (3, 13)

Step-by-step explanation:

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3 years ago