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Vikki [24]
3 years ago
11

Solve for xplease help! I'm so confused​

Mathematics
1 answer:
WINSTONCH [101]3 years ago
5 0

Answer:

a. x=7

b. x=2

Step-by-step explanation:

We have been given a graph of two circles and we are asked to solve for x.

a. We can see that x and 4 are secants of our given triangle, which intersect outside our given triangle, so we will use intersecting secants theorem to find the value of x.

Intersecting secants theorem states that when two secants intersect outside the circle, then the product of the measures of one secant segment and its external secant segment is equal to the product of the measures of the other secant segment and its external secant segment.

Using intersecting theorem we can set an equation as:

(x+5)*5=(4+6)*6

Let us solve for x.

5x+25=10*6

5x+25-25=60-25

5x=35

Let us divide both sides of our equation by 5.

\frac{5x}{5}=\frac{35}{5}

x=7

Therefore, value of x is 7.

b. Using intersecting secants theorem we can set an equation for our bigger circle as:

(5+3)*3=(x+4)*4

Let us solve for x.

8*3=4x+16

24-16=4x+16-16

8=4x

Let us divide both sides of our equation by 4.

\frac{8}{4}=\frac{4x}{4}

2=x

Therefore, the value of x for bigger circle is 2.

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Add, using the rule for order of operations if necessary:<br> 15+ [2 + (-4)] + (−9)?
schepotkina [342]

15 + ( - 2) +  - 9 = 13 - 9 = 4

#Goodluck!

8 0
1 year ago
What is the z score of a value that is 2.08 standard deviations greater than the mean
Vesna [10]
  The z- score is the number of standard deviations from the mean value of the reference population.
  For example: the z-score of 2 is 2 standard deviations above the mean.
  The z -score of a value that is 2.08 standard deviations greater than the mean is 2.08.
4 0
3 years ago
Gwen volunteered to work at the ticket booth for her school's Halloween carnival. The chart below gives the number of hours Gwen
n200080 [17]

A linear relation is a relationship between two variables that when the corresponding pair of values of the variables are plotted, a straight line is obtained

The equation for the relationship between hours Gwen worked and number of tickets is <u> t = </u><u>15·h</u>

<u />

The reason the above equation is correct is as follows:

The given parameters are;

The table of values;

Hours(h): 1, 2, 3, 4

Tickets (t): 15, 30, 45, 60

Required: To write an equation that gives the relation between the number of hours Gwen worked and the number of tickets sold

Solution:

From the given table, we have;

The common difference between successive <em>h-values </em>is 1

The <em>common difference</em> between successive t<em>-values </em>is 30 - 15 = 45 - 30 = 60 - 45 = 15 = Constant

Given that the common difference of the <em>h</em>, and <em>t-values</em> are constant, the relationship is a linear relationship of the form, t = m·h + c

Where;

m = The rate of change of <em>t</em> with <em>h</em>, as follows;

m = (30 - 15)/(2 - 1) = 15

∴ t - 15 = 15 × (h - 1)

t - 15 = 15·h - 15

t = 15·h - 15 + 15 = 15·h

t = 15·h

The equation for the relation between the number of hours Gwen worked and the number of tickets she sold is<u> t = </u><u>15·h</u>

<u />

Learn more about mathematical relationships here:

brainly.com/question/10185505

brainly.com/question/18936577

brainly.com/question/11391605

7 0
2 years ago
3(x-4) = 2(-2x + 1)<br>this is confusing me​
nata0808 [166]

Answer:

x = 2

Step-by-step explanation:

<em>Distribute</em>

3 (−4) = 2 (−2+1)

3 − 12 = 2 (-2x +1)

<em>Distrubute again</em>

3x - 12 = -4x + 2

<em>Add twelve to both sides of the equation</em>

<em>Simpfly</em>

3x = -4x + 14

<em>Add 4x to both sides of the equation</em>

<em>simpfly</em>

7x = 14

<em>Divide both sides of the equation by the same term</em>

<em>Simpfly</em>

x = 2

5 0
3 years ago
The sum of the ages of dauda and his brother is 2. Five years ago dauda was 3times as old as his brother . How old are they now
Aloiza [94]

Answer:

dauda = x \\ his \: brother = y \\ x + y = 2 \:  \:  \: (i) \\ 5(3x + y) = 5 \:  \:  \: (ii) \\ 15x + 5y = 5

I don't really remember this very well, because it confusing me

8 0
2 years ago
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