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2 years ago

SOMEONE HELP ME DO THESE 4 PROBLEMS FOR 50 points and BRAINLIEST.

Mathematics

2 answers:

USPshnik [31]2 years ago

6 0

Answer:

1. hypotenuse is 25

2. hypotenuse is 7.8

3. hypotenuse is 9.8

4. hypotenuse is 3.6

Step-by-step explanation:

To find the hypotenuse, just use the formula a^2 + b^2 = c^2

a and b are the sides with short lengths, while c is the one with the greatest line.

Let's try #1, and then you can do the rest by yourself, as it is very easy.

1) sides a and b are given, a = 7 and b = 24

hypotenuse = a^2 + b^2 = c^2

--> 7a^2 + 24b^2 = c^2

--> 49 + 576 = c^2

--> 625 = c^2

--> take the square root of 625

--> 25 = c

Norma-Jean [14]2 years ago

3 0

Answer:

Step-by-step explanation:

2. 24^2+7^2 = 625

V 625 = 25

3. 6^2 + 5^2 = 25 +36 = 61

V 61 =7.81024967 =7.8

4. 4^2 +9^2 = 97

V 97= 9.84885780 = 9.8

5. 2^2 +3^2 = 13

V 13 =3.60555127 =3.6

and done!

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o-na [289]

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7 0

3 years ago

In a simple regression analysis (where y is a dependent and x an independent variable), if the y-intercept is positive, then it

Rom4ik [11]

Answer:

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

Where:

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

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

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

And we can find the intercept using this:

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

On this case the correct answer would be:

E. none of the above

Since the intercept has no association between the increase/decrease of the dependent variable respect to the independent variable

Step-by-step explanation:

Assuming the following options:

A. there is a positive correlation between X and Y

B. there is a negative correlation between X and Y

C. if X is increased, Y must also increase

D. if Y is increased, X must also increase

E. none of the above

If we want a model $y = mx +b$ where m represent the lope and b the intercept

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

Where:

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

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

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

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

And we can find the intercept using this:

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

On this case the correct answer would be:

E. none of the above

Since the intercept has no association between the increase/decrease of the dependent variable respect to the independent variable

3 0

3 years ago

PLEASE HELP ASAP WILL MARK BRAINLIEST

luda_lava [24]

Answer:

x=11

Step-by-step explanation:

7x-9-4(x-1)=28

7x-9-4x+4=28

3x-5=28

3x=33

x=11

4 0

3 years ago

Fran has a plank of wood 4.65 meters long. She wants to cut it into pieces 0.85 meters long. How many pieces of wood that length

DochEvi [55]

5 pieces. 4.65÷0.85=5. so u divide and ur answer is 5

3 0

3 years ago

A line with a slope of -4 passes through the point

Viktor [21]

Answer:

y = -4x - 22

Step-by-step explanation:

m = -4

using (-6,2)

Slope-intercept: y = mx + b

2 = -4(-6) + b

2 = 24 + b

b = -22

y = -4x - 22

4 0

2 years ago