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3 years ago

When using "mean" does it mean average of something if not please explain, I'm a bit confused.

Mathematics

2 answers:

lesya [120]3 years ago

5 0

Mean the the total of all values, divided by the number of values

tensa zangetsu [6.8K]3 years ago

3 0

Answer: mean

Step-by-step explanation:

mean : average

median : middle number

mode : most frequent number

range : the difference between the highest and lowest numbers

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A hexagon has interior angles the measure 127, 85, 121, 135, and 139 find the measure of the remaining angle.

shtirl [24]

Answer:

113º

(pls mark brainliest if possible)

Step-by-step explanation:

Hexagon has sum of interior angles as 720º

127+85+121+135+139+x=720

607+x = 720

x= 113º

4 0

3 years ago

If the distance from A (5,6) to B (1, b) is twice the distance from B to

Nimfa-mama [501]

Answer:

The possible values of $b$ are -2.944 and -9.055, respectively.

Step-by-step explanation:

From statement we know that $AB = 2\cdot BC$ . By Analytical Geometry, we use the equation of a line segment, which is an application of the Pythagorean Theorem:

$AB = 2\cdot BC$

$\sqrt{(x_{B}-x_{A})^{2}+(y_{B}-y_{A})^{2}} = 2\cdot \sqrt{(x_{C}-x_{B})^{2}+(y_{C}-y_{B})^{2}}$ (1)

Where:

$x_{A}$ , $x_{B}$ , $x_{C}$ - x-Coordinates of points A, B and C.

$y_{A}, y_{B}, y_{C}$ - y-Coordinates of points A, B and C.

$(x_{B}-x_{A})^{2}+(y_{B}-y_{A})^{2} = 4\cdot (x_{C}-x_{B})^{2}+4\cdot (y_{C}-y_{B})^{2}$

Then, we expand and simplify the expression above:

$x_{B}^{2}-2\cdot x_{A}\cdot x_{B} +x_{A}^{2} +y_{B}^{2}-2\cdot y_{A}\cdot y_{B} + y_{A}^{2} = 4\cdot (x_{C}^{2}-2\cdot x_{C}\cdot x_{B}+x_{B}^{2})+4\cdot (y_{C}^{2}-2\cdot y_{C}\cdot y_{B}+y_{B}^{2})$

$x_{B}^{2}-2\cdot x_{A}\cdot x_{B} + x_{A}^{2} +y_{B}^{2}-2\cdot y_{A}\cdot y_{B} + y_{A}^{2} = 4\cdot x_{A}^{2}-8\cdot x_{C}\cdot x_{B}+4\cdot x_{B}^{2}+4\cdot y_{C}^{2}-8\cdot y_{C}\cdot y_{B}+4\cdot y_{B}^{2}$

If we know that $x_{A} = 5$ , $y_{A} = 6$ , $x_{B} = 1$ , $y_{B} = b$ , $x_{C} = 1$ and $y_{C} = -3$ , then we have the following expression:

$1 -10 +25 +b^{2} -12\cdot b+36 = 100 -8 +4 +36+24\cdot b +4\cdot b^{2}$

$b^{2}-12\cdot b +52 = 4\cdot b^{2}+24\cdot b +132$

$3\cdot b^{2}+36\cdot b +80 = 0$

This is a second order polynomial, which means the existence of two possible real solutions. By Quadratic Formula, we have the following y-coordinates for point B:

$b_{1} \approx -2.944$ , $b_{2} \approx -9.055$

In consequence, the possible values of $b$ are -2.944 and -9.055, respectively.

8 0

3 years ago

A person is playing a video game where the number of aliens that appear on a level triples each time from the previous level. Le

exis [7]

Answer:

A=5(3L) <-not fully sure if correct

A=aliens

L=levels

Step-by-step explanation:

3 0

2 years ago

Solve for x: 3x = 54

slavikrds [6]

X =54/3=18 ans
it is the answer

6 0

3 years ago

Read 2 more answers

Solve the equation for y.Then find the value of y for the given value of x. 7x-xy=-18;x=-4.

guajiro [1.7K]

7x - xy = -18 x = -4

First, fill the -4 in where the "x's" are.

7(-4) - (-4)y = -18

Then, add the 28 over.

-28 + 4y = -18
+28 +28

4y = 10

Then, get the variable by itself, so you would divide the 4 over.

4y = 10
÷4 ÷4

y = 2.5

4 0

3 years ago

Read 2 more answers