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hodyreva [135]
3 years ago
12

Determine if direct variation x-2y=0

Mathematics
1 answer:
Fofino [41]3 years ago
3 0

Answer:

x-2y=0 is a direct variation

Step-by-step explanation:

Direct variation is of the form

y= kx

Can we get the equation in that form

x-2y =0

Add 2y to each side

x-2y+2y =0_2y

x=2y

Divide each side by 2

x/2 = 2y/2

1/2x =y

Flip the sides

y = 1/2x

This is of the form y= kx where k = 1/2

x-2y=0 is a direct variation

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Can help me complete this problem please :c
FrozenT [24]

Answer:

112.5 deg

Step-by-step explanation:

First we find the area of the entire circle.

A = pi * r^2

A = pi * (4 m)^2

A = 16pi m^2

The entire circle has area = 16pi m^2.

The sector has area 5pi m^2.

Now we find the fraction the area of the sector is of the entire circle.

fraction = (5pi m^2)/(16pi m^2) = 5/16 = 0.3125

The full circle has a central angle of 360 deg, the entire circle.

The measure of the central angle of the arc of the sector is the same fraction of the entire circle.

measure of sector angle = 0.3125 * 360 deg = 112.5 deg

4 0
3 years ago
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(4x+3)(2x-5)<br><br> Help please 10 points
Yanka [14]

Answer:

Step-by-step explanation:

hello :

(4x+3)(2x-5)=0

4x+3=0 or 2x-5=0

x= -3/4 or x=5/2

5 0
3 years ago
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Find the unknown area
grin007 [14]

Answer: 81 mm^2

Step-by-step explanation: All the sides are the same length and area is just length * width so 9*9=81. You're welcome

8 0
3 years ago
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What is the solution to the system?
nikdorinn [45]
Point slope form again

-3-9/3+1= -3

y+1=-3(x-9)

y+1=-3x+27

y=-3x+26

5+1/2+1=2

y+1=2(x+1)

y+1=2x+2

y=2x+1

For your system of equations you have

y={y=-3x+26}
y={y=2x+1}

There is a couple ways you can solve this. You could either use a subtraction method, or a substitution method. since they are both y = something i would just substitute one y in one or the other equation.

2x+1=-3x+26

5x+1=26

5x=25

x=5

So now you just plug in x = 5 for each quotation and you have your y's for both solution points

y=-3(5)+26
y=11

y=2(5)+1
y=11

So this works out nice, your solutions for the set of equations is (5,11) since they are the same points

7 0
3 years ago
Amys class is selling books to raise money for a field trip. If each book sells for $7, how many books will they need to sell to
nikklg [1K]
You would start by setting up the equation:

7x=125 where x is equal to the number of books sold

x=17.9

Since you cannot sell .9 of a book, this must be rounded up to 18.
Therefore, Amy must sell 18 books.
3 0
3 years ago
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