2 years ago

What is necessary to determine the z-score for a raw score in a particular set of scores?.

Mathematics

1 answer:

Xelga [282]2 years ago

7 0

Answer:

See below

Step-by-step explanation:

The mean score and the standard deviation are needed

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What is the equation of a circle that has a center at (-4, 10) and a radius of 8?

mars1129 [50]

Answer:

The equation of the circle is $(x + 4)^2 + (y - 10)^2 = 64$ , third option is correct.

Step-by-step explanation:

Equation of a circle:

The equation of a circle with center $(x_0,y_0)$ and radius r is given by:

$(x - x_0)^2 + (y - y_0)^2 = r^2$

Center at (-4, 10)

This means that $x_0 = -4, y_0 = 10$ .

Radius of 8:

This means that $r = 8$ . So

$(x - x_0)^2 + (y - y_0)^2 = r^2$

$(x - (-4))^2 + (y - 10)^2 = 8^2$

$(x + 4)^2 + (y - 10)^2 = 64$

The equation of the circle is $(x + 4)^2 + (y - 10)^2 = 64$ , third option is correct.

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3 years ago

Survey math help please

marishachu [46]

75 females own a blue car out of 300 people. 75/300 x 100 = 25%

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3 years ago

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Given two functions f(x)=2x+4 and g(x)=−1/5x−3 , what is the function rule for (f+g)(x) ?

Angelina_Jolie [31]

The definition is pretty simple:

$(f+g)(x) = f(x)+g(x)$

So, we only have to sum the expressions:

$f(x)+g(x) = 2x+4 - \dfrac{1}{5}x-3 = \dfrac{9}{5}x+1$

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3 years ago

Hi i am having trouble dividing decimals, im not really sure how to devide at all i keep forgeting.

kolbaska11 [484]

If You know how to do long division then... You move the decimal that’s outside the house to where it’s not there no more then divide . Or turn the decimals into Fractions and do the reciprocal.

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3 years ago

in a survey 27% of the people chose salads over a meat dish. In all 81 people chose salads. how many people were in the survey?

Zolol [24]

Answer:

300

Step-by-step explanation:

27% = 81

1% = 81/27 = 3

100% = 100x3 = 300people

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3 years ago