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3 years ago

Which expression represents the average of three test scores?

Mathematics

2 answers:

jek_recluse [69]3 years ago

3 0

The answer is the third option. add up all the test scores and divide them by the number of people whose scores you added
which would be three people

guajiro [1.7K]3 years ago

3 0

Hi.

The mean of 3 test scores can be represented as:

<em /> $\frac{x + y + z }{3}$

~

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tresset_1 [31]

It can't be timing or cost since it is only a few people , i chose bias because a few people is actually 7 - 8 people

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3 years ago

What does x equal? plz help

erma4kov [3.2K]

Answer:

Step-by-step explanation:

∠E = ∠B

6x - 39 = 3x

6x - 3x = 39

3x = 39

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3 years ago

Solve x squared = 10

balu736 [363]

Answer:

=3.162

Step-by-step explanation:

= −0 + √ 02 − 4×1×(−10)

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3 years ago

Use inverse operations to solve the following:<br> 4.9 + z = -9

ale4655 [162]

The answer is z = -13.9

In order to solve this, you need to use inverse operations. The inverse operation of addition is subtraction. So, this is the function we'll use

4.9 + z = -9 ----> subtract 4.9 from both sides

z = -13.9

5 0

3 years ago

Directed line segment has endpoints P(– 8, – 4) and Q(4, 12). Determine the point that partitions the directed line segment in a

larisa86 [58]

Answer:

Point (1,8)

Step-by-step explanation:

We will use segment formula to find the coordinates of point that will partition our line segment PQ in a ratio 3:1.

When a point divides any segment internally in the ratio m:n, the formula is:

$[x=\frac{mx_2+nx_1}{m+n},y= \frac{my_2+ny_1}{m+n}]$

Let us substitute coordinates of point P and Q as:

$x_1=-8$ ,

$y_1=-4$

$x_2=4$

$y_2=12$

$m=3$

$n=1$

$[x=\frac{(3*4)+(1*-8)}{3+1},y=\frac{(3*12)+(1*-4)}{3+1}]$

$[x=\frac{12-8}{4},y=\frac{36-4}{4}]$

$[x=\frac{4}{4},y=\frac{32}{4}]$

$[x=1,y=8]$

Therefore, point (1,8) will partition the directed line segment PQ in a ratio 3:1.

7 0

3 years ago