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3 years ago

Find the mean of the following scores on a math test: 73, 54, 73, 93, 54 Round to the nearest whole number if necessary

Mathematics

1 answer:

elena55 [62]3 years ago

8 0

Hey!

To find mean, add all the numbers and divide by how many numbers there are.

$73 + 54 + 73 + 93 + 54 = 347$

There are 5 numbers. Divide 347 by 5

$347 \div 5 = 69.4$

<em>That means the mean is 69.4</em>

$\framebox{Mean = 69.4}$

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Write the slope-intercept form of the line that passes through (1, -2) and is parallel to the line y = 4x + 2.

Naily [24]

Use

y-y1=m(x-x1)

y-(-2)=4(x-1) Now why 4??Because parallel lines have the exact same slope

y+2=4x-4

y=4x-4-2

y=4x-6

Hope it helps!

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2 years ago

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Will give 25 points and brainliest answer if correct

Norma-Jean [14]

Let $d$ be the common difference between terms in the sequence $\{a_n\}_{n\ge1}$ . Then

$a_{19}=-58$
$a_{20}=a_{19}+d$
$a_{21}=a_{19}+2d$
$\implies-164=-58+2d\implies d=-53$

The first term in the sequence, $a_1$ , satisfies

$a_2=a_1+d$
$a_3=a_1+2d$
$a_4=a_1+3d$
...
$a_{19}=a_1+18d$
$\implies-58=a_1+18(-53)\implies a_1=896$

So the explicit formula for the $n$ -th term in the sequence is

$a_n=a_1+(n-1)d\implies a_n=896-53(n-1)$

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3 years ago

Carlos is using a number line to add another integer to –4. He begins by showing –4 on the number line, as shown below. Carlos a

kifflom [539]

The integer is 3 or less than 3.

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2 years ago

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What is the equation of a line perpendicular to y=1/4x+2 that passes through the point (0,1)

ipn [44]

Answer: y = -4x + 1 or y = 1 - 4x

Step-by-step explanation:

First, we have to find the slope of the perpendicular. The slope of the line perpendicular to the other is the <u>reciprocal and opposite value</u> of the other line's slope.

This means that the slope perpendicular to y = 1/4x + 2 is -4, or -4/1.

Now we need to find the y-intercept, to do that we will use the equation y = mx + b. m = slope, b = y-intercept.

Plug in the values.

1 = -4(0) + b

Simplify.

1 = 0 + b

1 = b

Our y-intercept is 1.

Now we can form the slope-intercept equation for the line perpendicular to y = 1/4x + 2 that passes through the point (0, 1).

y = -4x + 1

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2 years ago

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2 years ago

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