3 years ago

A line of best fit can only be established for data with positive correlation. true or false

Mathematics

2 answers:

Vanyuwa [196]3 years ago

8 0

I think it would be true

ipn [44]3 years ago

5 0

Answer is true ! Good luck

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6. Your average grade after 5 tests in Biology is a 65. However, after the most recent test your average increased to a 70. What

weeeeeb [17]

Answer:

i think you grade would go to 69%

Step-by-step explanation:

4 0

2 years ago

What is 24.5 divided by 2? Please show your work.

Paul [167]

Answer: 12.25

Explanation:

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3 years ago

A bicyclist goes 43.54 miles in 3.5 hours. What was her speed?

expeople1 [14]

All you have to do is divided 43.54 divided by 3.5 which is 12.44 mph

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3 years ago

Check whether (0, -2) is solution of the equation x - 2y = 4 or not

kaheart [24]

Answer:

Step-by-step explanation:

Plugin x = 0 & y = -2 in the LHS of the equation. After substituting, if you get the RHS, then this point is the solution of the equation.

x - 2y = 0 - 2*(-2)

= 0 + 4

= 4 = RHS.

(0,-2) is solution of the equation.

8 0

3 years ago

Using complete square to slove for x in the equation (x+7) (x-9)=25

Brrunno [24]

Answer:

$x_1=1+\sqrt{89}\\\\x_2=1-\sqrt{89}$

Step-by-step explanation:

Apply Distributive property:

$(x+7)(x-9)=25\\\\x^2-9x+7x-63=25$

Add like terms and then add 63 to both sides of the equation:

$x^2-2x-63=25\\\\x^2-2x-63+63=25+63\\\\x^2-2x=88$

Pick the coefficient of the x term, divide it by 2 and square it:

$(\frac{2}{2})^2=1$

Add it to both sides of the equation:

$x^2-2x+1=88+1$

Rewriting the left side as a squared binomial, we get:

$(x-1)^2=89$

Apply square root to both sides:

$\sqrt{(x-1)^2}=\±\sqrt{89}\\\\x-1=\±\sqrt{89}$

And finally we need to add 1 to both sides of the equation. Then we get:

$x-1+1=\±\sqrt{89}+1\\\\x=\±\sqrt{89}+1\\\\\\x_1=1+\sqrt{89}\\\\x_2=1-\sqrt{89}$

8 0

3 years ago