Solve the system of equations using elimination


10x−3y−81=0

−5x−7y−19=0

x = ?
y = ?

Answer:

A i did this one already

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Answer:

-0.9

Step-by-step explanation:

my guess

it's supposed to be the a number closest to 1 or-1

so

-0.9 is the closest number to 1 or -1

The answer to this question is:

0.8

What is line of best fit and correlation coefficient?

A straight line that best approximates the given set of data is known as a line of best fit. It is a line that, on a graph, roughly straddles the center of each scatter point. The association is stronger the closer the points are to the line of greatest fit.

The equation of a line of a best fit is represented as: y=mx + c

To gauge how closely two variables are related to one another, correlation coefficients are used.

Solution:

In order to determine how closely related two sets of data are, correlation coefficient formulas are used. The formulas provide a value in the range of -1 and 1, where

The strength of the link between the variables increases with the distance between the coefficients of +1.0 and -1.0.

-0.9 is a value which is greater than -0.8, so the values which are greater than -0.8 are not considered as strong correlation coefficient.

Whereas the values which are less than 0.8 are also not considered as strong coefficients.

Hence 0.8 is the correlation coefficient which represents the strongest linear relationship.

Learn more about "correlation coefficients" here-

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Answer:

t = p + 12

Independent variable: p

Dependent variable: t

Step-by-step explanation:

Answer:

its c

Step-by-step explanation:

just bc

Answer:

Acute and isosceles

Step-by-step explanation:

Acute triangle because with all sides equal, all the angles are acute

Isosceles triangles have (at least) 2 equal sides. This is actually an equilateral triangle, where all 3 are equal. A scalene triangle has 3 unequal sides.

Answer:

180

Step-by-step explanation:

Answer:

-3<x<-1

Step-by-step explanation:

Areas under the x-axis have y-values less than 0.

As you can see in the graph, the equation is under the x-axis between -1 and -3 on the x-axis.

-1 and -3 are not included because they are exactly on 0 on the y-axis and the question is asking for numbers that are LESS than 0.

Answer:

Length = (7 + x)

Step-by-step explanation:

In this question we have to convert the verbal expression to algebraic expression.

Let the width of the rectangle = x cm

"Length of the rectangle is 7 cm longer than it's width"

Length = 7 + Width

Length = (7 + x) cm

Therefore, equation for which length of the rectangle is defined will be,

Length = (7 + x)  

Answer:

d

Step-by-step explanation:

3/3

Answer:

21

Step-by-step explanation:

Answer:

its 83.6859 km but simplified it would be 84 km

Step-by-step explanation:

Answer:

answer below

Step-by-step explanation:

I think you mean "squashed" or "stretched" vertically by a factor of 5.

f(x) is the original parabola equation

g(x) = 5f(x) is vertically stretched by a factor of 5

(x,y) -> (x , 5y)

Answer:

its b

Step-by-step explanation:

Answer:

[tex]a=\dfrac{4x-7}{x}[/tex]

Step-by-step explanation:

The equations of lines are :

y=4x-5 and y=ax+2

From above equations,

4x-5 = ax+2

4x-ax = 5+2

4x-7 = ax

[tex]a=\dfrac{4x-7}{x}[/tex]

So, the value of a is equal to [tex]\dfrac{4x-7}{x}[/tex].

Answer:

It is 1/36

Step-by-step explanation:

Brainliest plzzz

3. {6,9,15)

for these u have use Pythagoras theorem

Answer:

340

Step-by-step explanation:

We can see in the sample that 18/50 people bring lunches to school. If we divide 18 by 50 we get 0.36 now we know that 36% of people bring their lunches in the sample. Now we take that number and multiply it by 942.

0.36*942= 339.12 which we can round to 340

Answer:

50 Cans (I think)

Step-by-step explanation:

I set up the proportion of 9/50 and 45/x and cross-multiplied to find x.  After solving for x, which was 250, I subtracted all of the other paints.

250-48-45-39-35-33=50

That's how I got to 50 cans sold.

Answer: 90 players.

Step-by-step explanation:

Since we are informed that in a survey of a random sample of 50 players, 3 players were hurt. This gives a fraction of 3/50 for those that are hurt.

Therefore, in a survey of 1500 players, the number of players expected to be hurt will be:

= 3/50 × 1500

= 90

Answer:wow

Step-by-step explanation:

This is honestly amazing 10/10

Answer:

7680πyd³

Step-by-step explanation:

The formula to calculate the volume of the cylinder is πr² h

Here radius (r) = 16 yd

height (h) = 30 yd

Now

the volume is

= πr²h

= 16² * 30 * π

= 7680 π yd³

Hope it will help :)❤

Answer:

10

Step-by-step explanation:

Let the three consecutive positive even integers be x-1, x and x+1

First = x-1

Second = x

Third  = x+1

If the product of the second and third integers is twenty more than ten times the first integer, then;

x(x+1) = 20 + 10(x-1)

Open the bracket

x² + x = 20 + 10x - 10

x² + x = 10x + 10

x² + x - 10x - 10 = 0

x² - 9x - 10 = 0

x² -10x + x - 10 = 0

x(x-10)+ 1(x-10) = 0

(x+1)(x-10) = 0

x+1 = 0 and x-10 = 0

x = -1 and 10

Hence the 2nd of three consecutive positive even integers is 10

Answer:

35

Step-by-step explanation:

angles in a straight line add up to 180°

so 180-75=105

105÷3= 35

Answer:

1 and - 4is the correct answer

Answer: you actually already have the answer I would show work but that’s too much typing but trust. 733.04

Step-by-step explanation:

Answer:

12.5%

Step-by-step explanation:

% of change = the difference between the new price and the old price ÷ the old price × 100

=> % of change = (18.9 - 16.8) ÷ 16.8 × 100 = 12.5

=> The ans will be 12.5%

Answer:

3π

Step-by-step explanation:

period = 3π

An equation that models the considered calorie consumption by Jonathan is y = mx + 6k, where m is the number of calorie per buiscuit, and k is the number of calorie per package of pemmican.

You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.

We're specified that:

Let we take:

m = number of calories per buiscuit that Jonathan eats.

Then, for x buiscuits, it would be [tex]m \times x[/tex] calories, or in short [tex]mx[/tex] calories.

Let k = number of calories per package of pemmican, then:

for 6 packages of pemmican, it would be [tex]6 \times k[/tex] calories, or in short [tex]6k[/tex] calories.

Thus, total calories Jonathan consumes = y = calories from x buiscuits + calories from 6 packages of pemmican.

or, we get:

[tex]y = mx + 6k[/tex]

Thus, an equation that models the considered calorie consumption by Jonathan is y = mx + 6k, where m is the number of calorie per buiscuit, and k is the number of calorie per package of pemmican.

Learn more about forming equations here:

https://brainly.com/question/11938672