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3 years ago

Which correlation coefficient represents the strongest relationship between two variables?

Mathematics

1 answer:

oksian1 [2.3K]3 years ago

5 0

A direct correlation between two variables is y = kx where k is a constant. In inverse relationship is y=k/x.

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What should you know about the slopes of perpendicular lines? SOMEONE HELP ME

Goryan [66]

Let's use an example

Say we had two lines P and Q. If P has slope 2/5, then Q must have slope -5/2 in order for P and Q to be perpendicular.

Note how -5/2 is the negative reciprocal of 2/5. In other words, you flip the fraction and the sign to go from either slope.

Another thing to notice is that the two slopes multiply to -1. This is true for any pair of perpendicular lines as long as neither line is vertical.

8 0

4 years ago

Read 2 more answers

Which expressions are equivalent to 4d+6+2d4d+6+2d ? Choose all answers that apply: Choose all answers that apply: (Choice A) A

Sliva [168]

Answer:

Options A and C are correct choices.

Step-by-step explanation:

We have been given an expression $4d+6+2d$ and we are asked to choose all the equivalent expressions from given choices.

Let us simplify our given expression.

$4d+6+2d=(4d+2d)+6$

$4d+6+2d=6d+6$

Let us see which of our given choices matches with our answer.

A. $2(3d+3)$

Upon using distributive property $a(b+c)=a*b+a*c$ we will get,

$2*3d+2*3$

$6d+6$

Therefore, option A is a correct choice.

B. $6(d+6)$

Upon using distributive property $a(b+c)=a*b+a*c$ we will get,

$6*d+6*6$

$6d+36$

Since this expression is not equivalent to our answer, therefore, option B is not a correct choice.

C. $(3d+3)+(3d+3)$

Upon removing parenthesis we will get,

$3d+3+3d+3$

Upon combining like terms we will get,

$(3d+3d)+(3+3)$

$6d+6$

Therefore, option C is the correct choice.

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3 years ago

5/x^2-5x - x/5x-25 simplify

Debora [2.8K]

$\bf \cfrac{5}{x^2-5x}-\cfrac{x}{5x-25}\implies \cfrac{5}{x(x-5)}-\cfrac{x}{5(x-5)}\impliedby \stackrel{LCD}{5x(x-5)}
\\\\\\
\cfrac{25-x^2}{5x(x-5)}\implies \cfrac{5^2-x^2}{5x(x-5)}\implies \cfrac{\stackrel{\textit{difference of squares}}{(5-x)(5+x)}}{5x(x-5)}
\\\\\\
\cfrac{\boxed{-\underline{(x-5)}}(5+x)}{5x\underline{(x-5)}}\implies \cfrac{-(5+x)}{5x}\implies \cfrac{-5-x}{5x}$

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3 years ago

V= u + at u=2 a= -5 t=1/2 work out the value of v

N76 [4]

Answer:

v = -1/2

Step-by-step explanation:

Step 1: Plug in variables

v = 2 + (-5)(1/2)

Step 2: Multiply

v = 2 - 5/2

Step 3: Subtract

v = -1/2

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3 years ago

Read 2 more answers

Which ordered pair is a solution to the system?

andreev551 [17]

The answer is C.(-2,3)

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3 years ago