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3 years ago

MATH HELP PLEASE I WILL MARK BRAINLIEST !!!! WHY IS THIS NOT FACTORABLE ?

Mathematics

1 answer:

Leya [2.2K]3 years ago

8 0

I think that -25 should be +25.

so it would be (7x-5)^2

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I need help with number 5

Tju [1.3M]

Answer:

B. BD = 9

Step-by-step explanation:

Simply set the 2 equations equal to each other (both are congruent due to perpendicular bisector):

6x + 3 = 3x = 6

3x + 3 = 6

3x = 3

x = 1

Then substitute 1 for <em>x</em> in BD

6(1) + 3

6 + 3

BD = 9

7 0

3 years ago

Read 2 more answers

Plz help ASAP! I will mark brainliest if correct

MaRussiya [10]

A = L^2
A = L^2 = 2^2 + 4^2 (Pythagorean’s theorem)
A = L^2 = 20
Therefore the area of the square is 20 units square.

5 0

3 years ago

Read 2 more answers

HELP!

Vesna [10]

A(n)=a+(n-1)d
A(40)= -1+(40-1)-4
A(40)= -1+39(-4)
A(40)= -1+(-156)
A(40)= -157

4 0

2 years ago

What is an example of when you would want consistent data and, therefore, a small standard deviation?

steposvetlana [31]

Answer:

12.1, 12.3,12.4,12.5,12.3,12.1,12.2

$\bar X= \frac{12.1+12.3+12.4+12.5+12.3+12.1+12.2}{7}=12.271$

And for the standard deviation we can use the following formula:

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

And after replace we got:

$s = 0.1496$

And as we can ee we got a small value for the deviation <1 on this case.

Step-by-step explanation:

For example if we have the following data:

12.1, 12.3,12.4,12.5,12.3,12.1,12.2

We see that the data are similar for all the observations so we would expect a small standard deviation

If we calculate the sample mean we can use the following formula:

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

And replacing we got:

$\bar X= \frac{12.1+12.3+12.4+12.5+12.3+12.1+12.2}{7}=12.271$

And for the standard deviation we can use the following formula:

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

And after replace we got:

$s = 0.1496$

And as we can ee we got a small value for the deviation <1 on this case.

8 0

2 years ago

Write the equation of the line fully simplified slope-intercept form.

mixer [17]

Answer:

y = -x + 8

Step-by-step explanation:

The equation can be written as;

y = mx + b

where b is the y-intercept

From the diagram , b= 8

y = mx + 8

To get m, substitute (8,0 ) into the equation

0 = 8x + 8

x = -8/8

x = -1

So the full equation is;

y = -x + 8

3 0

2 years ago