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2 years ago

PLEASE HELP WITH MATH GRADIENTS I WILL GIVE BRAINLIEST.

Mathematics

2 answers:

Svet_ta [14]2 years ago

7 0

Answer:

Step-by-step explanation: So the straight line is given by the equation: y = k * x + by=k∗x+b

Let write line L as: y_1(x) = k_1 * x + b_1y

(x)=k

∗x+b

Line L: 4 * y - 6 * x = 334∗y−6∗x=33

Let write line L in general form: y = \dfrac{33 + 6 * x}{4} = 1.5 * x + 8.25y=

33+6∗x

=1.5∗x+8.25

From L line's equation: k_1 = 1.5k

=1.5 , b_1 = 8.25b

=8.25

Let write line M as: y_2(x) = k_2 * x + b_2y

(x)=k

∗x+b

Perpendicularity condition of two lines is: k_2 = - \dfrac{1}{k_1}k

=−

k_2 = -\dfrac{1}{1.5} = -\dfrac{2}{3}k

=−

1.5

=−

Substitute the numbers in M line's equation:

M: y_2(x) = -\dfrac{2}{3} * x + b_2M:y

(x)=−

∗x+b

Let put in this equation values from point A(x_a = 5, y_a = 6)A(x

=5,y

=6)

M: 6 = -\dfrac{2}{3} * 5 + b_2M:6=−

∗5+b

b_2=6 + \dfrac{2}{3} * 5=\dfrac{28}{3}b

=6+

∗5=

Substitute b_2b

in M line's equation:

M: y_2(x) = -\dfrac{2}{3} * x + \dfrac{28}{3}M:y

(x)=−

∗x+

Let put in this equation values from point B(x_b = -4, y_b = k)B(x

=−4,y

=k)

M: k = -\dfrac{2}{3} * (-4) + \dfrac{28}{3} = \dfrac{8+28}{3}=\dfrac{36}{3}=12M:k=−

∗(−4)+

8+28

=12

k = 12k=12

Scrat [10]2 years ago

5 0

Answer: 12

Step-by-step explanation: do not lie to me you better mark me a brainly or going to report you

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Angelina_Jolie [31]

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Step-by-step explanation:

divide 18 by 16

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3 years ago

A sample of 5 buttons is randomly selected and the following diameters are measured in inches. Give a point estimate for the pop

Helen [10]

Answer:

$s^2 = \frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}$

But we need to calculate the mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_I}{n}$

And replacing we got:

$\bar X = \frac{ 1.04+1.00+1.13+1.08+1.11}{5}= 1.072$

And for the sample variance we have:

$s^2 = \frac{(1.04-1.072)^2 +(1.00-1.072)^2 +(1.13-1.072)^2 +(1.08-1.072)^2 +(1.11-1.072)^2}{5-1}= 0.00277\ approx 0.003$

And thi is the best estimator for the population variance since is an unbiased estimator od the population variance $\sigma^2$

$E(s^2) = \sigma^2$

Step-by-step explanation:

For this case we have the following data:

1.04,1.00,1.13,1.08,1.11

And in order to estimate the population variance we can use the sample variance formula:

$s^2 = \frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}$

But we need to calculate the mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_I}{n}$

And replacing we got:

$\bar X = \frac{ 1.04+1.00+1.13+1.08+1.11}{5}= 1.072$

And for the sample variance we have:

$s^2 = \frac{(1.04-1.072)^2 +(1.00-1.072)^2 +(1.13-1.072)^2 +(1.08-1.072)^2 +(1.11-1.072)^2}{5-1}= 0.00277\ approx 0.003$

And thi is the best estimator for the population variance since is an unbiased estimator od the population variance $\sigma^2$

$E(s^2) = \sigma^2$

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3 years ago

DUE IN 5 MINUTES MATH QUESTION

kumpel [21]

Answer:

x= -10

Step-by-step explanation:

So because the angle 55 is part of the same line as one of the unknown angles you can do 180-55 to find that first angle at the top, which is 125.

Next add all three angles (125 + x + 35 + x + 40)=180

Combine the x values to get 2x and subtract the three values from 180

Then 2x= -20, x should be equal to -10

You can plug x back into the values and check your work by adding all the values again, making it all equal to 180 degrees again

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3 years ago

When cross canceling fractions, can you multiply vertically?

mr Goodwill [35]

I think the answer is no

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3 years ago

Help, ASAP! Please!!

Yuliya22 [10]

Answer:

a. Parallel

b. Not parallel

Step-by-step explanation:

Systems which have no solutions are parallel lines. These lines do not intersect and therefore have no solution. Remember, parallel lines have the same slope. Compare the slope in each equation when in y=mx+b format to see if they are parallel.

a. y= 2x + 3 y-2x=-3 becomes y = 2x - 3

m = 2 m= 2

The slopes are the same so these are parallel lines.

b. 3x + y = 2 becomes y= -3x + 2 y = 1/3 x + 1/2

m = -3 m= 1/3

The slopes are different so this is not parallel.

Since -3 and 1/3 are the negative reciprocals of each other. These lines are actually perpendicular.

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3 years ago