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3 years ago

What is x please help

Mathematics

1 answer:

NeTakaya3 years ago

5 0

Your x will be -60 because you subtract 9x from 8x that equal-1 and you divide it by 60 because if you add 42+18 it will be 60 so you divide 60 by -1 and the answer will be -60

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Equation for a circle with a diameter that has endpoints at (2, –5) and (8, –9)

chubhunter [2.5K]

The standard form for the equation of a circle is :

<span><span> (x−h)^2</span>+<span>(y−k)^2</span>=r2</span><span> ----------- EQ(1)
</span> where handk are the x and y coordinates of the center of the circle and r<span> is the radius.
</span> The center of the circle is the midpoint of the diameter.

So the midpoint of the diameter with endpoints at (2,-5)and(8,-9) is :

((2+(8))/2,(-5+(-9))/2)=(5,-7)

So the point (5,-7) is the center of the circle.

Now, use the distance formula to find the radius of the circle:

r^2=(2−(5))^2+(-5−(-7))^2=9+4=13

⇒r=√13

Subtituting h=5, k=-7 and r=√13 into EQ(1) gives :

(x-5)^2+(y+7)^2=13

5 0

3 years ago

The graphs of the quadratic function y= 2x^2and the exponential function y= 2^x are shown below.

11111nata11111 [884]

Answer:

Step-by-step explanation:

7 0

3 years ago

I'll give the usual stuff of brainliest and thanks to the first person, plus some extra points.

tino4ka555 [31]

Answer:

I really don't get your question

6 0

3 years ago

HURRY PLEASE PLEASE

Olegator [25]

Polynomials are algebraic expressions represented by variables and coefficients.

<h3>(a) How to determine the interval the open seats increased</h3>

This is the interval, where the open seats increase the same time the time in minutes increases.

From the graph, the open seats increases at the interval (100, 600)

<h3>(b) The time the first meeting ended</h3>

This is the first point where the curve changes its direction from decreasing values to increasing values

From the graph, the curve changes its direction at point (25,100)

Hence, the first meeting ended at 10:25 AM

<h3>(c) When there were 700 open seats</h3>

From the graph, we have:

(x,y) = (5, 700)

Hence, there were 700 open seats at 10:05 AM

<h3>(d) The average rate of change from 10:00 AM to 10:25 AM</h3>

At 10:00 AM, we have:

(x,y) = (0,800)

At 10:25 AM, we have:

(x,y) = (25,100)

So, the average rate of change is:

$m = \frac{y_2 -y_1}{x_2 -x_1}$

This gives

$m = \frac{100 - 800}{25 - 0}$

$m = \frac{-700}{25 }$

$m = -28$

Hence, the average rate of change from 10:00 AM to 10:25 AM is -28 people per minute

Read more about polynomials at:

brainly.com/question/4142886

7 0

2 years ago

Can you help me pleeeeaaassee??

melamori03 [73]

Error 1: DT / TS × CT / TR which is the first error. We can fix the error by writing the correct equation RT / TD = ST / TC, Error 2: The second error is 7 / 16 × (x - 1) / 14 and we can fix the error by writing the equation 14 / 7 = 16 / (x - 1), Error 3:The third error is the value of x and we can find the correct value of x from the equation 14 / 7 = 16 / (x - 1) and the value of x is 9.

Given: The diagram is given and we need to find the errors and then fix them. Also ΔTSR ≈ ΔTCD

Let's solve the given question:

Given that ΔTSR ≈ ΔTCD

So we know by the properties of the similarity that if two triangles are similar then the ratio of their corresponding sides is equal.

So, ΔTSR ≈ ΔTCD

=> RT / TD = ST / TC

=> 14 / 7 = 16 / (x - 1)

In the question, we can observe that the given side ratio is DT / TS × CT / TR which is the first error. We can fix the error by writing the correct equation RT / TD = ST / TC.

The second error is 7 / 16 × (x - 1) / 14 and we can fix the error by writing the equation 14 / 7 = 16 / (x - 1).

The third error is the value of x.

We can find the correct value of x from the given equation:

14 / 7 = 16 / (x - 1)

=> 2 = 16 / (x - 1)

Multiplying both sides by (x - 1):

(x - 1) × 2 = 16 / (x - 1) × (x - 1)

=> 2(x - 1) = 16

Multiplying both sides by 1 / 2:

2(x - 1) × 1 / 2= 16 × 1 / 2

=> x - 1 = 8

Adding 1 on both sides:

x - 1 + 1 = 8 + 1

x = 9

Therefore x = 9.

Hence the errors are:

Error 1: DT / TS × CT / TR which is the first error. We can fix the error by writing the correct equation RT / TD = ST / TC

Error 2: The second error is 7 / 16 × (x - 1) / 14 and we can fix the error by writing the equation 14 / 7 = 16 / (x - 1).

Error 3:The third error is the value of x and we can find the correct value of x from the equation 14 / 7 = 16 / (x - 1) and the value of x is 9.

Know more about "similar triangles" here: brainly.com/question/14366937

#SPJ9

8 0

1 year ago