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2 years ago

12

Michael measures the round rim of a jar and then calculates that it has a circumference of 18.84 centimeters. What is the rim's

diameter? Use 3.14 for

1 answer:

grin007 [14]2 years ago

8 0

Answer:

i dont know

Step-by-step explanation:

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28 is equal to _________ hundredths.

andriy [413]

Answer: 28,09

Step-by-step explanation:

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

6 0

3 years ago

What is the circumference of a circle with a 12cm diameter?

pochemuha

Answer:

37.7cm

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

What is the answer of question 1

jeyben [28]

Answer: don't know sorry

Step-by-step explanation:

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3 years ago

The sum of a number and 4 times another number is 25. What is the equation?

Sophie [7]

Let x and y represent the two numbers. The equation matching the word description is ...
x +4y = 25

4 0

3 years ago