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3 years ago

Apply distributive property 7(r+9)

Mathematics

1 answer:

kati45 [8]3 years ago

3 0

Answer:

7r+63

Step-by-step explanation:

7(r+9)

7(r)+7(9)

7r+63

Hope this helps .-.

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WILL GIVE 50 POINTS FOR CORRECT ANSWER ASAP AND WILL GIVE BRAINLIEST.

Rufina [12.5K]

Answer:

(2, -1)

Step-by-step explanation:

because that's where the lines intersect

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3 years ago

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If the ratio of y to x is equal to 3 and the sum of y and x is 80, what is value of y

Rus_ich [418]

Answer:

y = 60

Step-by-step explanation:

<h3>Step 1: Make sense of the given</h3>

"The ratio of y to x is 3"

This means that, $y\div x=3$

"The sum of y and x is 80"

This means, $x+y=80$

<h3>Step 2: Make use of the facts</h3>

If $y\div x=3$ , then $y = (3*x)$ .

We can plug this into the other equation by substitution:

$x + (3 * x)=80$

This simplifies to:

$4x = 80$

Which we can solve out and get:
$x=20$ .

We solved for x, but we need the value of y.

So, we go back to the equation we first derived: " $y = (3*x)$ ".

And now we substitute the value of x, into this.

$y = (3 * (20))$

By solving this out, we get:
$y=60$

So, the value of y is 60.

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1 year ago

For the following paired data, (1) Calculate the correlation coefficient, r, and (2) at the 0.05 significance level, determine w

expeople1 [14]

Answer:

Linear correlation exists

Step-by-step explanation:

Given the data :

X : | 2 4 5 6

Y : | 6 9 8 10

Using technology to fit the data and obtain the correlation Coefficient of the regression model,

The Correlation Coefficient, r is 0.886

To test if there exists a linear correlation :

Test statistic :

T = r / √(1 - r²) / (n - 2)

n = number of observations

T = 0.886 / √(1 - 0.886²) / (4 - 2)

T = 0.866 / 0.3535845

T = 2.449

Comparing Pvalue with α

If Pvalue < α ; Reject H0

Pvalue = 0.1143

α = 0.05

Pvalue > α ; We reject the null and conclude that linear correlation exists

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3 years ago

Simplify<br><br> Will mark brainliest, please show work if possible

Reil [10]

The answer for this question is 8/1

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3 years ago

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Can somebody please help me with this?<br><br>

Kisachek [45]

Answer:

The slope of the line is:

$-\frac{3}{4}$

Slope of a parallel line is the same:

$-\frac{3}{4}$

Slope of a perpendicular line, invert the sign and fraction:

$\frac{4}{3}$

Hope this helps

4 0

1 year ago