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3 years ago

Which of the equations below represents a line perpendicular to the yaxis?

Mathematics

2 answers:

Oliga [24]3 years ago

5 0

Answer:

y=x

Step-by-step explanation:

ivanzaharov [21]3 years ago

4 0

Answer:

D. y = -6

Step-by-step explanation:

You can graph each line to see which one is horizontal since the y-axis is vertical. This would make the lines perpendicular since when a vertical and horizontal line meet, they form a 90-degree angle, which is by definition what perpendicular means.

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#20 is this the correct answer bc I'm not sure what it means when it says "what are the areas of the two sectors" does that mean

Lelechka [254]

$\bf \textit{area of a sector of a circle}\\\\
A=\cfrac{\theta\pi r^2}{360}\qquad 
\begin{cases}
r=4\\
\theta=112
\end{cases}\implies A=\cfrac{112\cdot 16\cdot \pi }{360}\implies \boxed{A=\cfrac{224}{45}\pi}
\\\\\\
A\approx 15.64\\\\
-----------------------------\\\\
\textit{area of a circle is }\pi r^2\textit{ so the other side will be}
\\\\\\
\pi r^2-\cfrac{224\pi }{45}\implies 16\pi -\cfrac{224\pi }{45}\implies \boxed{\cfrac{496\pi }{45}}\implies A\approx 34.68$

5 0

3 years ago

Solve the equation for y.Then find the value of y for the given value of x. 7x-xy=-18;x=-4.

guajiro [1.7K]

7x - xy = -18 x = -4

First, fill the -4 in where the "x's" are.

7(-4) - (-4)y = -18

Then, add the 28 over.

-28 + 4y = -18
+28 +28

4y = 10

Then, get the variable by itself, so you would divide the 4 over.

4y = 10
÷4 ÷4

y = 2.5

4 0

3 years ago

Read 2 more answers

Dreama's Videos charges members $4 to rent each video. If you get a store membership it costs $20 and members only pay $2 to ren

anygoal [31]

Answer:

The cost is the same at 10 videos.

Your equations are:

2x + 20

The answer, 10, means that there are 10 videos.

Step-by-step explanation:

First, write out your two equations. It should look like this:

Dreama's Videos: 4x

Membership: 2x + 20

To solve, I keep filling in numbers for x until you get the answer. If you fill in the number 10, for x, you get that it costs $40 for both of them. So, the cost is the same at 10 videos. Your two equations are 4x and 2x + 20. The x represents the number of videos. So, when you get the number 10, it means that there are 10 videos. Hope this helped!

5 0

3 years ago

Read 2 more answers

Which equation represents a direct variation?

Alecsey [184]

Answer:

y= 1/2 x Im sure thats the answer.

7 0

3 years ago

Please help! Will mark best answer!!

luda_lava [24]

I'm pretty sure the answer is A. 9.11

4 0

3 years ago