Circles multiple choice<br>geometry <br>please help<br>

Solve for x 2cos^2x-3cosx+1=0

marishachu [46]

<span> x= Pi, x = 2pi/3, x = 4pi/3
That is the answer</span>

8 0

3 years ago

What is the domain of the function graphed below?

I am Lyosha [343]

Answer:

x < 7

Step-by-step explanation:

the domain is the number range or interval of x the function is defined for to generate a y-value.

the graph shows that the y-values continue with x-values to the right up to but not including 7 (the empty dot says "excluding"). and with x- values to the left to negative infinity.

x=-1 is not a problem, because while for the left part of the function it is not included, but for the right part it is.

so, it is fully defined for all x < 7.

4 0

3 years ago

Match the circle equations in general form with their corresponding equations in standard form. x2 y2 − 4x 12y − 20 = 0 (x − 6)2

frosja888 [35]

The equation given is matched with the respective vertex forms.

<h3>What is the standard Equation for a circle ?</h3>

The standard equation for a circle is given by

(x-h)² + (y-k)² = r²

The equation given in the question are

x² + y² − 4x + 12y − 20 = 0

(x − 6)² + (y − 4)² = 56

x² + y² + 6x − 8y − 10 = 0

(x − 2)² + (y + 6)² = 60

3x² + 3y² + 12x + 18y − 15 = 0

(x + 2)² + (y + 3)² = 18

5x² + 5y² − 10x + 20y − 30 = 0

(x+3)² + (y-4)² = 35

2x² + 2y² − 24x − 16y − 8 = 0

(x-1)² + (y+2)² = 11

The first equation is

x² + y² − 4x + 12y − 20 = 0

It can be written ad

x² -4x + 4 - 4 +y²+12y +36-36 -20 = 0

(x-2)² +(y+6)²= 60

The second equation is

x² + y² + 6x − 8y − 10 = 0

x² +6x +9-9 +y² -8y +16-16 -10 = 0

(x+3)² + (y-4)² = 35

The third equation is

3x² + 3y² + 12x + 18y − 15 = 0

(x + 2)² + (y + 3)² = 18

The fourth equation is

5x² + 5y² − 10x + 20y − 30 = 0

(x-1)² + (y+2)² = 11

The fifth equation is

2x² + 2y² − 24x − 16y − 8 = 0

(x − 6)² + (y − 4)² = 56

To know more about standard equation of Circle

brainly.com/question/13658927

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7 0

2 years ago

Use the equation P(A or B)= P(B)-P(A and B) to find the missing value below.

Anvisha [2.4K]

Answer:

$P(B) = \frac{7}{8}$

Step-by-step explanation:

Given

P(A or B)= P(B)-P(A and B)

P(A)=1/3

P(A and B)=1/8

P(A or B)= 3/4

Required

Find P(B)

To find P(B), all we need to do is to substitute values of P(A or B) and P(A and B) in the given equation.

This goes thus;

P(A or B) = P(B) - P(A and B) becomes

$\frac{3}{4} = P(B) - \frac{1}{8}$

Make P(B) the subject of formula

$P(B) = \frac{3}{4} + \frac{1}{8}$

Take L.C.M

$P(B) = \frac{6 + 1}{8}$

Add fractions

$P(B) = \frac{7}{8}$

From the workings above, the value of P(B) using the given equation is $\frac{7}{8}$

6 0

3 years ago

Help me please i’m struggling, u don’t have to explain

Rom4ik [11]

<h3>Answer: 10 cm (choice A)</h3>

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Explanation:

One equation we could solve is

x/2.5 = 30/7.5

Note the x/2.5 has us dividing the vertical sides, while 30/7.5 is the same idea for the horizontal sides. The order is large over small. You could do small over large, but make sure you keep both sides consistent.

Solving for x leads to...

x/2.5 = 30/7.5

x*7.5 = 2.5*30

7.5x = 75

x = 75/7.5

x = 10 (choice A)

There are many other possible equations that lead to the same answer. One other possible equation is x/30 = 2.5/7.5

These proportions are possible due to the fact we have similar triangles.

7 0

2 years ago

Circles multiple choicegeometry please help​

Circles multiple choicegeometry please help