3 years ago

I seem to be confused can anyone please help

Mathematics

1 answer:

Genrish500 [490]3 years ago

6 0

Use photo math :>some helpful info

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Gelneren [198K]

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3 years ago

SOMEONE PLEAAAAAAAAAAAASE HELP

rodikova [14]

4x+5 = 8x - 11
4x - 8x = -11 - 5
-4x = -16
x = 4

4x+5 = 4(4) +5 = 21
8x - 11 = 8(4) - 11 = 21

<RST = 21 + 21 = 42

answer
<RST = 42 degrees

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3 years ago

If the standard deviation for a set of data is 0, which of the following must be true?

luda_lava [24]

Answer:

C. All of the data values are identical.

Step-by-step explanation:

If the standard deviation for a set of data is 0, then all of the data values are identical.

When a standard deviation is 0, then the variance is also 0 and the mean of the deviation that is squared is also 0, thereby making all the values identical to the mean, that is 0.

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3 years ago

Does exposure to classical music (through instrument lessons or concert attendance) improve children's scholastic performance? I

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The explanatory variable is the amount of exposure the student is given to classical music.

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3 years ago

A(x, 1), B(5,3) and C(4,-3) are the vertices of triangle ABC. If AB=AC, find the value of x

Molodets [167]

$\\ \rm\longmapsto AB=AC$

$\\ \rm\longmapsto \sqrt{(x-5)^2+(1-5)^2}=\sqrt{(x-4)^2+(1+3)^2}$

$\\ \rm\longmapsto (x-5)^2+(-2)^2=(x-4)^2+4^2$

$\\ \rm\longmapsto (x-5)^2+4=(x-4)^2+16$

$\\ \rm\longmapsto (x-5)^2-(x-4)^2=16-4=12$

$\\ \rm\longmapsto x^2-10x+25-x^2+8x-16=12$

$\\ \rm\longmapsto -2x+9=12$

$\\ \rm\longmapsto -2x=12-9=3$

$\\ \rm\longmapsto x=\dfrac{3}{-2}=-1.5$

5 0

3 years ago

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