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3 years ago

Solve for X 3x - 6 = 30

Mathematics

1 answer:

Aleksandr [31]3 years ago

3 0

Answer:

The answer is x=12

Step-by-step explanation:

3x - 6 = 30

3x-6+6=30+6

3x=36

To find x divide both sides by 3.

3x/3=36/3

x=12

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3 years ago

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o-na [289]

Answer:

T = 290

Step-by-step explanation:

We can find the sum of all observations multiplying sample size (n) by sample mean (x).

Sum of all observations in the data set is,

$T=n_{1} x_{1}+n_{2}x_{2}+n_{3}x_{3}+n_{4}x_{4}\\T=10(5.3)+10(7)+10(8.5)+10(8.2)\\T=53+70+85+82\\T=290$

Hope this helps!

7 0

3 years ago

The sum of c and 9 is equal to 16

amid [387]

Answer:

c = 7

Step-by-step explanation:

The sum means to add c and 9, that is

c + 9 = 16 ( subtract 9 from both sides )

c = 16 - 9 = 7

5 0

3 years ago

Read 2 more answers

The walls of a room are representations of what basic element of geometry? A. point B. line C. plane D. ray

kkurt [141]

In geometry,

A point represents a point

Two points define a line extended on both sides of the points.

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Option C) is the right answer.

6 0

3 years ago

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write an equation of the perpendicular bisector of the line segment whose endpoints are (-1,1) and (7,-5)

gladu [14]

Find midpoint of segment.
(-1,1), (7,-5)
$x= \frac{-1+7}{2}=3,y= \frac{1+(-5)}{2}=-2$

Find slope of line which passes through (-1,1) and (7,-5).
$m= \frac{-5-1}{7-(-1)}= \frac{-6}{8}=- \frac{3}{4}$

The slope of perpendicular line is negative reciprocal value of m.
$m_{\perp}=- \frac{1}{m} =- \frac{1}{- \frac{3}{4} } = \frac{4}{3}$

Write quation of line which slope is $\frac{4}{3}$ and passes throug the point (3,-2).
$m=\frac{4}{3},x_1=3,y_1=-2
\\y-y_1=m(x-x_1)
\\
\\y-(-2)=\frac{4}{3}(x-3)
\\
\\y+2=\frac{4}{3}x-\frac{8}{3}
\\
\\3y+6=4x-8
\\4x-3y-14=0$

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2 years ago