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3 years ago

Find the value of x. 45 60 90 80

Mathematics

1 answer:

IRISSAK [1]3 years ago

4 0

Answer:

Step-by-step explanation:

The formula you want is x°= $\frac{1}{2}$ (major arc - minor arc)

If the minor arc is 90, and all the way around the outside of a circle is 360 degrees, that means that the major arc measures 360 - 90 = 270. Filling in our formula:

x°= $\frac{1}{2}$ (270 - 90)

x° = $\frac{1}{2}$ (180)

That gives us that x is a right angle at 90°

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Expand this question. <br><br> 3(x+2)

irakobra [83]

Answer:

3(x+2)

3x+6

Step-by-step explanation:

We should multiply it by 3

3 0

2 years ago

Read 2 more answers

Which graph represents the solution to the compound inequality?

zmey [24]

The graph which represents the solution to the compound inequality is; -2 ≤ x < 5.

<h3>Which graph represents the solution to the compound inequality?</h3>

The inequalities given in the task content can be solved as follows;

For –2x + 4 ≤ 8

-2x ≤ 8 -4

x >= -2

For –2x + 4 > –6

–2x > –6 -4

x < 5

Hence, the graph which represents the solution to the compound inequality is; -2 ≤ x < 5.

Read more on compound inequality;

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2 years ago

To find the height of a tower, a surveyor positions a transit the is 2 meters tall at a spot of 40 meters from the base of the t

Mrac [35]

The height of the tower roughly equals 41.421 meters.

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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:

$x_2+x_3=-7$ , $x_2=-7-x_3$
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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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Sauron [17]

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