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bixtya [17]
3 years ago
15

9r+4d-2 use r=9 and d=2

Mathematics
2 answers:
Leto [7]3 years ago
7 0

Answer:

87

Step-by-step explanation:

Reptile [31]3 years ago
6 0

Answer:

87

Step-by-step explanation:

9x9=81

4x2=8

81+8=89

89-2=87

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kondor19780726 [428]

Answe

Step-by-step explanation:

4 0
3 years ago
Which of the following is a description of the data with a correlation coefficient of 1?
timama [110]

Answer:

perfect negative correlation

Step-by-step explanation:

correlation coefficient is the term used in statistic which provides the information of strength of relation between two variables. This value suggests if there is change in value of one variable, what will be the change in the variable and how much will value of that change.

What will be the change : it suggest whether change in value of one variable other will be increase or decrease .

If there is increase in one variable and other also increases it suggest there is positive correlation .

If there is decrease in one variable and other also decrease it suggest there is positive correlation .

how much will value of that change: It means to say if there is change in one variable by how much amount other variable will change.

If the value of correlation coefficient is high it means that  change in value   for one variable is high in to  response change in other variable .

It values ranges from -1 to +1 high

while sign depicts type of relation that is positive or negative .

value from - 1 to + 1 depicts strength of the relation .

with - 1 depicting  perfect negative correlation

+1   depicting perfect positive correlation.

In the problem it is given correlation coefficient is 1 which means it is positive and value of one means that if there x percentage increase in one variable then other variable will also increase by x percentage and vice versa.

5 0
3 years ago
Four ingredients costing $320 per kg, $240 per kg, $160 per kg and $80 per kg are mixed so that their masses are in the ratio 4:
Mariulka [41]

Answer:

$2160

Step-by-step explanation:

(320*4)+(240*1)+(160*3)+(80*2) = 2160

6 0
3 years ago
PLEASEEEE HELPPP!!
Rina8888 [55]

Answer:

3. Distributive

Step-by-step explanation:

In the equation 3(x - 2y) if you distribute the 3 to the x and the -2 you would get 3x-6y.

4 0
3 years ago
A line passes through the point (3 comma 1 comma negative 8 )​, and is parallel to the vector 5 Bold i plus 3 Bold j plus 3 Bold
motikmotik

The line \ell passing through (3, 1, -8) and running parallel to the vector <5, 3, 3> has the vector equation

\ell=(3\,\vec\imath+\vec\jmath-8\,\vec k)+t(5\,\vec\imath+3\,\vec\jmath+3\,\vec k)

or

\ell=(3+5t)\,\vec\imath+(1+3t)\,\vec\jmath+(3t-8)\,\vec k

and from this we can extract a set of parametric equations for the line:

\begin{cases}x(t)=5t+3\\y(t)=3t+1\\z(t)=3t-8\end{cases}

where t\in\Bbb R.

4 0
4 years ago
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