are the lines parallel, perpendicular, or neither ? 3y=-x 3x=y

Answer:

y= 1.06x

Step-by-step explanation:

We can write an expression for a direct variation equation as

y=kx

K= constant of proportionality

Then, to write direct variation equation that relates x liters to y quarts, we know that k= 1.06 quarts. which is constant, if we substitute we have

y= 1.06x

Answer:

29 games

Step-by-step explanation:

Simply divide the amount spent by the number of games.

For January, it would be 56/4 = $4 each game

The same goes on for the following months, even March since the problem states that each game costs the same amount.

So $116/$4 = 29 games.

Vernon downloaded 29 games in March.

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.

Given:

Month   Games Downloaded    Cost

  JAN                 14                      $56

  FEB                 23                      $92

  MAR                 __                     $116

  APR                 19                      $76

Now, In January the price for each game

=56 /15

=$4 each game

In February the price for each game

=92/23

=$4 per game

So, In March

= $116/ $4

= 29 games.

Hence, Vernon downloaded 29 games in March.

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Answer:

[tex]\displaystyle \cos(\alpha+\beta)=\frac{21}{221}[/tex]

Step-by-step explanation:

First, we can draw two right triangles to represent the given information.

Please refer to the attachment.

We will ignore the negatives for now.

The triangle on the left represents the ratio:

[tex]\displaystyle \tan(\alpha)=\frac{15}{8}[/tex]

And the triangle on the right represents the ratio:

[tex]\displaystyle \sin(\beta)=\frac{5}{13}[/tex]

And the unknown side, c and d, were determined using the Pythagorean Theorem.

We want to find:

[tex]\displaystyle \cos(\alpha+\beta), \; \pi/2<\alpha<\pi, \; \pi/2<\beta<\pi[/tex]

So, both α and β are in QII.

Using the Sum Identity, we can write our expression as:

[tex]\displaystyle\cos(\alpha+\beta) =\cos(\alpha)\cos(\beta)-\sin(\alpha)\sin(\beta)[/tex]

Now, we will use our triangles and what we know about our angles and quadrants.

Since α and β are in QII, cosine is always negative, sine is always positive, and tangent is always negative.

Now, we can use our trig ratios. Recall SohCahToa.

According to the first triangle, cos(α) is 8/17.

However, since α is in QII, cos(α) must be -8/17.

Likewise, according to the second triangle, cos(β) is 12/13.

Since β is in QII, cos(β) is -12/13.

Now, we can determine our sine ratios.

According to the first triangle, sin(α) is 15/17.

And since α is in QII, this stays positive.

And, sin(β), as given to us, is 5/13.

Therefore, we will substitute this into our equation. So:

[tex]\displaystyle \cos(\alpha+\beta)=(-\frac{8}{17})(-\frac{12}{13})-(\frac{15}{17})(\frac{5}{13})[/tex]

Evaluate:

[tex]\displaystyle \cos(\alpha+\beta)=\frac{96}{221}-\frac{75}{221}[/tex]

Hence:

[tex]\displaystyle \cos(\alpha+\beta)=\frac{21}{221}[/tex]

Answer:

$2160

Step-by-step explanation:

(320*4)+(240*1)+(160*3)+(80*2) = 2160

Four ingredients costing $320 per kg, $240 per kg, $160 per kg and $80 per kg are mixed so that their masses are in the ratio 4:1:3:2. The average cost per kg of the mixture, would be $2160.

The average is defined as the mean value of the given data which is equal to the ratio of the sum of the data value to the total number of units present in the data.

It is given that

Four ingredients costing $320 per kg, $240 per kg, $160 per kg and $80 per kg are mixed so that their masses are in the ratio 4:1:3:2.

(320 x 4) = 1280

(240 x 1) = 240

(160 x 3) = 480

(80 x 2) = 160

The averege cost per kg of the mixture,

1280 + 240 + 480 + 160

= 2160

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Answer:

About 7%

Step-by-step explanation:

He got 27/29 cm correct which is about 93% so he was off by 7%.

Answer:

d

Step-by-step explanation:

i got it

Answer:

The correct answer is D

Step-by-step explanation:

My reason for giving this answer is because this problem is written in expression form. Since there is a variable in the expression, You cannot solve X-7 without outside information on the value of X. So D would be the answer because The answer to a multiplication problem is called the product, Then the answer to a subtraction problem is a difference. Answer D says "The product of a number and a difference", Which would mean multiplication and subtraction.

Hope this helped!

Answer:

5x-3

Step-by-step explanation:

three less than 5 so three will come after the 5. and the number (x) is being multiplied by 5

Answer:

Object b

Step-by-step explanation:

So you see that when you look at the graph it shows two point and you would think A is bigger because its higher. So when looking closely it look that object B is a lot farther that object A making it greater than object A because A is a lot higher but time is shorter than abject B.

This might be wrong so sorry I tried.

:)

Answer:

A

Step-by-step explanation:

You could do a calculation.

A: d/t = 10 / 2 = 5 m/s

B: d/2 = 4/3 = 1.33 m/s

A has the greater unit rate.

Answer: 17/18

Step-by-step explanation:

Answer:

x=2+[tex]\sqrt[]{2}[/tex]   or x= 2-[tex]\sqrt[]{2}\\[/tex]

Step-by-step explanation:

Answer:

I bc it has an invisible 1 at the side

Answer:

Liner

Step-by-step explanation:

17,21,18,20,24

Answer:

It would be 160 (C)

Step-by-step explanation:

160 is the only one that works if u rplace x with 160.

Answer:

160

This is how I got my answer I divided each answer by 4 to see if it equaled 40 and 160 divided by 4 equals 40 so 160 is your answer

Answer: you didnt post graphs to look at

Step-by-step explanation:

Answer:

3n + 12 = 4

Step-by-step explanation:

hope this help, pls mark brainliest :D

Answer:

did you try google ? I usally search up things when I dont usally know i dont know to be honest try to search it up if you already did then good luck I hope someone answers

Answer:

A. Selecting one person from a group of four boys and two girls.

Step-by-step explanation:

A dice has six sides and here we have six people we're trying to choose from. If each person is assigned a number on the dice rolling the dice once will pick out of the six of them.

Answer:

A and D

Step-by-step explanation:

A is pretty obvious becuase there are four girls and two boyd which add up to six

Now D would be correct because you have two options so you can split it up 50/50 to get your answer!

HOPE this helps you!

Answer:

x=3

Step-by-step explanation:

Answer:

55

Step-by-step explanation:

180-125= 55

Answer:

55

Step-by-step explanation:

Line DCF is 125. A straight line is 180. So, if you are missing a degree of an angle when you have another angel given to you, then just subtract 180 from the degree that was given. So it's more like this: 180 - 125 = 55.

Answer:

Step-by-step explanation:

15+13+3=30

Hope this helps! And Merry Christmas!

Answer:

1 boy can work about 0.3 hours

Step-by-step explanation:

The answer is about 0.3 because 3 divided by 9 is 0.333 but rounded its just 0.3

P.S Can I have brainliest?

From point A to point C, we can see there's a wide range between 0 and -10. It's not possible for the answer to be B or D, since the point lays between -10 and 0, and those points are both beyond -10. Between A and C, the best answer would be C. -8.45, since the point is much closer to 10 that it is to the center, around where -5.8 would be.

Answer:

-2

Step-by-step explanation:

Y=3x-2

y=3x0-2

y=-2

Answer:

1/4

Step-by-step explanation:

Probability of (mutually exclusive events) randomly pick a orange or number less than three is  P(A or B) = ( 3/ 4).

" Two events 'A' and 'B' are said to be mutually exclusive events if and only if they are not happening at the same time. It is written as P(A or B)."

Formula used

Probability = (Number of favourable outcome) / Total outcomes

For Mutually exclusive event

P(A or B) = P(A) + P(B)

P(A∩B) = 0

According to the question,

Let O₁, O₂, O₃, O₄ be the orange balls numbered one to four.

Let G₁, G₂, G₃, G₄ be the green balls numbered one to four.

As per condition,

Randomly pick a ball which is orange or numbered less than three is mutually exclusive event.

Let A represents the event ball to be orange.

Let B  represents the event ball to be number less than three.

Number of total outcomes = 8

Favourable outcome for event A =4

Favourable outcome for event B =2

Therefore,

P(A) = 4 / 8

P(B) = 2 /8

Substitute the value in the formula of mutually exclusive event P(A or B) we get,

P(A or B) = ( 4 / 8) + ( 2 / 8)

              = ( 6 / 8)

               = ( 3 / 4)

Hence, probability of ball to be orange or number less than 3 is

P(A or B) = 3 /4.

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x=15

if this is not right, please report me

Answer:

C

Step-by-step explanation:

The he has to pay 40$ a month (40*m or 40m) + the intial amount of 75. So put together this equation would be C. Hope this helps!!! :)

Answer: C t = 40m +75

Step-by-step explanation: