4 years ago

Solve -3x+y=-7 by slope intercept form

Mathematics

1 answer:

marin [14]4 years ago

8 0

can u add picture?

if u dont add picture i cant solve sorry...

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under a dilation, the point (2,6) is moved to (6,18) what is the scale factor of the dilation? enter your answer in the box

Anestetic [448]

Step-by-step explanation:

The equation of line passing through the two points is $\frac{y-y_{1} }{x-x_{1} }=\frac{y_{2} -y_{1}}{x_{2} -x_{1}}$

When substituted,the equation becomes $\frac{y-6}{x-2}=\frac{18-6}{6-2}$

which when simplified is $y=3\times x$

The line clearly passes through origin.

The distance between two points is $\sqrt{(y_{1}-y_{2} )^{2}+(x_{1}- x_{2} )^{2}}$

Distance between origin and $(2,6)$ is $\sqrt{40}$ .

Distance between origin and $(6,18)$ is $\sqrt{360}$

Scale factor is $\frac{distance\text{ }of\text{ }p_{2}\text{ from origin}}{distance \text{ } of \text{ } p_{1}\text{ from origin}}$

So,scale factor is $\frac{\sqrt{360} }{\sqrt{40} }$

which when simplified becomes 3.

6 0

3 years ago

Suppose the auction house from the preceding problem sold 200 tickets at $1 each, and had 16 prizes of $10 each. What is the new

Brilliant_brown [7]

200/160=1.25

200+160=360/1.25/160=200.8

so your answer is 0.8

4 0

3 years ago

What is equivalent to 5 squared times 9 squared

Pepsi [2]

Answer:

2,025

Step-by-step explanation:

5 squared is 5x5 = 25

9 squared is 9x9 = 81

25x81 = 2,025

4 0

3 years ago

-144r = -12rk find the value

OLga [1]

k = 12

cancel out the r on both sides

then divide -144 by -12.

you get 12.

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3 years ago

Justin Bieber's sand castle is 180 cm tall but the wind is

larisa [96]

Answer:

Smh why justin bieber tho.

Step-by-step explanation:

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4 years ago