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2 years ago

Solve for x 2(x-3)+21=-3

Mathematics

1 answer:

algol [13]2 years ago

6 0

Answer:

X=-9

Step-by-step explanation:

First, distribute the 2. So, it would be 2x-6+21=-3. Then, bring the -6 and 21 to the right side. It would now be 2x= -18. X would be equal to -9.

Hope this helps!

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Using Slopes of Parallel Lines Quick Check

Semenov [28]

Answer:

The answer is (B) ⇒ Yes. AB is parallel to CD and AD is parallel to BC

Step-by-step explanation:

There is an important fact about the parallel lines:

Parallel lines have equal slopes

The rule of the slope of a line is:

$m=\frac{y_{2}-y_{1} }{x_{2}-x_{1}}$ , where $(x_{1},y_{1})$ and $(x_{2},y_{2})$ are two points on the line

Let us use the fact and the rule to solve the question

∵ ABCD is a quadrilateral

∵ A = (0, 2) , B = (2, 6), C = (9, 6), D = (7, 2)

∵ The opposite sides are AB, CD and AD, BC

Find the slopes of the four sides to check the parallel sides

∵ $m_{AB}=\frac{6-2}{2-0}=\frac{4}{2}=2$

∵ $m_{CD}=\frac{2-6}{7-9}=\frac{-4}{-2}=2$

∵ The slope of AB = The slope of CD

∴ AB // CD

∵ $m_{AD}=\frac{2-2}{7-0}=\frac{0}{7}=0$

∵ $m_{BC}=\frac{6-6}{9-2}=\frac{0}{7}=0$

∵ The slope of AB = The slope of CD

∴ AD // BC

The correct answer is:

Yes. AB is parallel to CD and AD is parallel to BC ⇒ (B)

5 0

3 years ago

4. Find the correct table for the given rule: y=x+2

swat32

Answer:

Table B is the correct answer.

Step-by-step explanation:

6 0

4 years ago

Find the value of X

Morgarella [4.7K]

Answer:

x = 7

Step-by-step explanation:

<> sum of the interior angles of the polygon is (8-2)*180 = 1080°

<> since all the lengths are equal it implies all the angles are equal

<> there are 8 angles

=> 8(16x + 23) = 1080

=> 16x + 23 = 135

=> 16x = 135 - 23

=> 16x = 112

=> x = 112/16

=> x = 7

please give me brainlist if it is helpful for you

8 0

3 years ago

Carlos bought 29 pounds of rice for $12 How many pounds of rice did he get per dollar?

olasank [31]

29 / 12 = x / 1
29 / 12
x = 2.42 about

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3 years ago

PLEASE HELP What are the zeros of function f(x)=x^2+5x+5 written in simplest radical form?

ludmilkaskok [199]

Your answer is the third option.

3 0

3 years ago