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3 years ago

Help! 13 points and brainliest! Question in picture attached

Mathematics

1 answer:

Talja [164]3 years ago

6 0

I agree with the first person!!!!

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Koby can work about 22 math problems in 30 minutes. At this rate how many math problems can Koby work in 3 hours

Murrr4er [49]

132 problems because...

there are six 30 minutes in 3 hours so you would multiply 22 with 6 to get 132
(22*6=132)

4 0

3 years ago

Read 2 more answers

Which of the following is the standard equation of the ellipse with vertices at (1,0) and (27,0) and an eccentricity of 5/13?

Dovator [93]

The equation of the elipse is given by:

$\frac{(x - 14)^2}{169} + \frac{y^2}{144} = 1$

The equation of an elipse of center $(x_0, y_0)$ is given by:

$\frac{(x - x_0)^2}{a^2} + \frac{(y - y_0)^2}{b^2} = 0$

Values a and b are found according to the <u>vertices and the eccentricity</u>.

It has vertices at (1,0) and (27,0), thus:

$x_0 = \frac{27 + 1}{2} = 14$

$y_0 = \frac{0 + 0}{2} = 0$

$a = \frac{27 - 1}{2} = 13$

$a^2 = 169$

It has eccentricity of $\frac{5}{13}$ , thus:

$\frac{5}{13} = \frac{c}{a}$

$\frac{5}{13} = \frac{c}{13}$

$c = 13$

Thus, b is given according to the following equation:

$c^2 = a^2 - b^2$

$b^2 = a^2 - c^2$

$b^2 = 169 - 25$

$b = \sqrt{144}$

$b = 12$

The equation of the elipse is:

$\frac{(x - 14)^2}{169} + \frac{y^2}{144} = 1$

A similar problem is given at brainly.com/question/21405803

3 0

3 years ago

Write the equation of the line passing through the (1,-2)

AleksAgata [21]

Theres information missing in the question. There should be one more pair of coordinates

8 0

3 years ago

Write the equation of a line that has a slope of -4 and goes through (-2,7).

Anni [7]

Answer:

$y = -4x - 1$

Step-by-step explanation:

Equation of a line is given as:

y = mx + b

Where

m is the slope

and

b is the y-intercept (y-axis cutting point)

Since we know slope is -4, we can write:

y= mx + b

y = -4x+ b

Given the point (-2,7) , we can say:

x = -2

and

y = 7

Plugging these 2 values, we can solve for b:

y = -4x + b

7 = -4(-2) + b

7 = 8 + b

b = 7 - 8

b = -1

Now, we have the equation:

$y = -4x - 1$

7 0

3 years ago

Y-4x=3 in slope intercept form

Alecsey [184]

Step-by-step explanation:

y - 4x = 3

Writing in slope intercept form that is y = mx + c

y = 4x + 3

Hope it will help :)

4 0

3 years ago

Read 2 more answers