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2 years ago

Equation through the point (5,9) with a slope of -4

2 answers:

4 0

The answer is: y=-4x+29

To solve this, you need to know the y-intercept.
1. y=-4x+b
2. 9+-4(5)+b
3. 9=-20+b
4. b=9+20
5. b=29
6. Substitute into y=-4x+b

melomori [17]2 years ago

3 0

Y-9=-4(x-5) Remove the () y-9=-4x+5 Simplify the equation by adding 9 to each side. y=-4x+14 (I used the point slope form and turned it into slope intercept form).

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Learning Task 1: Write the fraction of each shaded figure. Find the sum. Write your answer in your notebook.

Tresset [83]

<h3> Learning task 1</h3>

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Step by step explanation:

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2 years ago

You use substitution to solve a system of equations and, after simplifying the equations, end with an expression that says 0 = 4

attashe74 [19]

Answer:

Check the first two.

Step-by-step explanation:

Since the statement is false, there are no solutions to the system of equations. This also indicates that the lines are parallel.

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2 years ago

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Find the height of the triangle. A=2c^3+16, b=c+2

larisa [96]

A is an angle since it is a capital letter and both b and c are sides. We also know one height of the triangle could equal b times sinA. So my height=(c+2)(sin(2c^3+16)), depending on which height we are looking for, in this case I am using c as the base.

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3 years ago

Please help me answer the question in the photo.

aleksley [76]

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7 0

2 years ago

Your body loses sodium when you sweat. Researchers sampled 38 random tennis players. The average sodium loss was 500 milligrams

Salsk061 [2.6K]

Answer:

The 99% confidence interval to estimate the mean loss in sodium in the population is between 474.10 milligrams and 525.90 milligrams. This means that we are 99% that the true mean loss in sodium in the population is between 474.10 milligrams and 525.90 milligrams.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 2.575*\frac{62}{\sqrt{38}} = 25.90$

The lower end of the interval is the mean subtracted by M. So it is 500 - 25.90 = 474.10 milligrams.

The upper end of the interval is the mean added to M. So it is 500 + 25.90 = 525.90 milligrams

7 0

2 years ago