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wolverine [178]
3 years ago
6

If the mean is 4, what is the missing number of the data set: 3, 4, ___, 7, 2, 1.

Mathematics
1 answer:
kodGreya [7K]3 years ago
4 0

Answer:

7

Step-by-step explanation:

Let the missing number of the data be x.

\because mean =  \frac{3 + 4 + x + 7 + 2 + 1}{6}  \\  \\ \therefore 4 = \frac{17 + x }{6}  \\  \\ \therefore 4 \times 6 = 17 + x \\  \\ \therefore 24 - 17 = x \\  \\\therefore x = 7

Thus, the missing number of the data is 7.

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Find the median of the following set of data 12,20,1,20,8
Alenkasestr [34]

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Step-by-step explanation:

6 0
3 years ago
Which of these is a factor in this expression?
NikAS [45]

Answer:

answer C

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Find the area of ABC with vertices A(3,-6), B(5,-6), and C(7,–9).
stellarik [79]

Area of a triangle ABC with the given vertices is 3 square units.

Given that, the vertices of a triangle ABC, A(3,-6), B(5,-6), and C(7,–9).

<h3>What is the area of triangle formula in coordinate geometry?</h3>

In Geometry, a triangle is a three-sided polygon that has three edges and three vertices. The area of the triangle is the space covered by the triangle in a two-dimensional plane.

Area of a triangle = \frac{1}{2} ( |x_1(y_2 - y_3) + x_2(y_3 - y_1) + x_3(y_1 - y_2)|)

Here, (x1, y1) = A(3,-6), (x2, y2) = B(5,-6), and (x3, y3) = C(7,–9)

Now, the area of a triangle = 1/2 (|3(-6+9)+5(-9+6)+7(-6+6)|)

= 1/2 (|3(3)+5(-3)+7(0)|)

= 1/2 (|(9-15)|)

= 1/2 × 6

= 3 square units

Therefore, area of a triangle ABC with the given vertices is 3 square units.

To learn more about the area of a area of triangle with vertices visit:

brainly.com/question/26633662.

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7 0
1 year ago
solve systems of equation. equation number 1: 9 x squared + 4 y squared equals 144. equation 2: x squared plus y squared equals
grigory [225]
9x^{2} + 4y^{2} =144
x^{2} + y^{2}=24

9x^{2} + 4y^{2} =144
 4x^{2} + 4y^{2}=96
by the difference 
5x^{2}=48
so x=\sqrt{\frac{48}{5}} or x=-\sqrt{\frac{48}{5}}
and y^{2}=24-\frac{48}{5}
then y=\sqrt{\frac{72}{5}} or -\sqrt{\frac{48}{5}}
5 0
3 years ago
There is an automatic fee of $10 just to enter the parking lot, and when she leaves the lot, she will have to pay an additional
nignag [31]

Answer:

$20

Step-by-step explanation:

10+(2*5)=20

7 0
3 years ago
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