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3 years ago

Which expression will have the same value as 3(4x + 9 ) - 6x for all values of x?

Mathematics

1 answer:

Marizza181 [45]3 years ago

5 0

An equal expression would be: 6x+27

All I did was just distribute and then subtract

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3. Is XY Tangent to circle Z? Y 12 X (20 Z 18

Ratling [72]

Answer:

XY is a tangent

Step-by-step explanation:

Given

$XY = 12$

$WY = 20$

$WZ = 8$

Required

Is XY a tangent?

XY is a tangent if:

$WY^2 = XY^2 + WX^2$

Because XY should make a right angle at point X with the circle

Where

$WX = 2 * WZ$

So, we have:

$WY^2 = XY^2 + WX^2$

$WY^2 = XY^2 + (2*WZ)^2$

$WY^2 = XY^2 + (2WZ)^2$

$WY^2 = XY^2 + 4WZ^2$

This gives:

$20^2 = 12^2 + 4*8^2$

$400 = 144 + 256$

$400 = 400$

Yes, XY is a tangent

4 0

3 years ago

Write an equation that represents the line. (-3,-6) and (2,-2) use exact numbers

Ilia_Sergeevich [38]

Given:

The line passes through (-3,-6) and (2,-2).

To find:

The equation of line.

Solution:

If a line passes through two points $(x_1,y_1)\text{ and }(x_2,y_2)$ , then the equation of line is

$y-y_1=\dfrac{y_2-y_1}{x_2-x_1}(x-x_1)$

The line passes through (-3,-6) and (2,-2). So, the equation of line is

$y-(-6)=\dfrac{-2-(-6)}{2-(-3)}(x-(-3))$

$y+6=\dfrac{-2+6}{2+3}(x+3)$

$y+6=\dfrac{4}{5}(x+3)$

$y+6=\dfrac{4}{5}(x)+\dfrac{4}{5}(3)$

Subtract 6 from both sides.

$y=\dfrac{4}{5}(x)+\dfrac{12}{5}-6$

$y=\dfrac{4}{5}(x)+\dfrac{12-30}{5}$

$y=\dfrac{4}{5}(x)+\dfrac{-18}{5}$

$y=\dfrac{4}{5}(x)-\dfrac{18}{5}$

Therefore, the equation of line is $y=\dfrac{4}{5}(x)-\dfrac{18}{5}$ .

3 0

3 years ago

Use a protractor to draw a pentagon so that the bottom side is horizontal and the left and right sides are perpendicular to the

Advocard [28]

Answer:

110

Step-by-step explanation:

I took the test

5 0

2 years ago

Read 2 more answers

G(1) = 0 = lgn= ) +m g(n) = g(n - 1) +n = - n g(2) =

yKpoI14uk [10]

Answer:

g(1) = 0

lgn= ) +m

g(n) = g(n - 1) +n

g(2) =12

Step-by-step explanation:

12345678910

6 0

2 years ago

100 POINTS PLEASE HELP EXPLAIN CLEARLY AND YOU GET BRAINIEST!!!!!

Fittoniya [83]

Answer:

if it is the curvy one it is -2 and for the segment/line it is -1.

Step-by-step explanation:

The x coordinate is the answer i don't know why u gave so many points.

5 0

3 years ago

Read 2 more answers