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3 years ago

Simplify the below expression.

Mathematics

1 answer:

Lemur [1.5K]3 years ago

7 0

The answer is B^5 also known as answer choice A

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Classify the triangle based on the side lengths 9, 40 and 41.

artcher [175]

Answer: right triangle

Step-by-step explanation: 9, 40, and 41 are examples of Pythagorean triples.

8 0

2 years ago

Solve for x9(x + 1) = 25 + x

vaieri [72.5K]

When you expand the equation, you will have
9x + 9=25 + x
Next you have to collect like terms
+x will go over the equality sign to become -x. The same applies to +9
9x - x=23 - 9
9x minus x is 8x
8x=14
Divide both sides by 8
x=14/8
You will have 1 6/8
6 is the remainder while 1 is the number of times 8 divided 14.
In decimal, it will be 1.75
Hope that helped. Good luck

8 0

3 years ago

Read 2 more answers

Can someone help me with this math homework please!

love history [14]

1. f(-6)=8

2.-2

3. 4

Hope this helps you...

3 0

2 years ago

What is half way between -5 degrees F and postive 15 degrees F?

andre [41]

To find the halfway points between two numbers, add the numbers and divide the quantity by 2. -5+15 equals 10 and 10/2=5 therefore 5 is halfway between -5 and 15.

3 0

3 years ago

A regression analysis between weight (y in pounds) and height (x in inches) resulted in the following least squares line: ŷ = 13

Lunna [17]

Answer:

$y=6x +135$

And for this case the interpretation for the slope would be that for every unit that the height in inches increase then the weight in pounds increase 6 units.

For the intercept of 135 represent the amount initial amount of weight for the scale.

Step-by-step explanation:

We assume that they use least squares in order to create the regression equation

For this case we need to calculate the slope with the following formula:

$m=\frac{S_{xy}}{S_{xx}}$

Where:

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}$

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}$

With these we can find the sums:

And the slope would be:

$m=6$

The means for x and y are given by:

$\bar x= \frac{\sum x_i}{n}$

$\bar y= \frac{\sum y_i}{n}$

And we can find the intercept using this:

$b=\bar y -m \bar x$

For this case we know that the line adjusted is:

$y=6x +135$

And for this case the interpretation for the slope would be that for every unit that the height in inches increase then the weight in pounds increase 6 units.

For the intercept of 135 represent the amount initial amount of weight for the scale.

3 0

3 years ago