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Alex
3 years ago
12

Does the equation represent a direct variation? If so, find the constant of variation.

Mathematics
1 answer:
saveliy_v [14]3 years ago
7 0

Answer:

Variation constant = -(\frac{5}{3})

Step-by-step explanation:

If two variables x and y represent a direct variation then they will have the relation as y = kx

Here k is the constant of variation.

Since the given equation that represent a direct variation is 5x = -3y

3y = -5x

y=(-\frac{5}{3})x

If we compare this equation with y = kx then we find k=(-\frac{5}{3})

Therefore constant of variation is -(\frac{5}{3})

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4.5 + 4.5 + 4.5 = 13.5
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3 years ago
Danielle and David each have a job. Danielle earns $15 an hour. She also receives a $50 weekly bonus. Danielle wrote an equation
S_A_V [24]
For starters, create an equation to show David's earnings. We can do this using Danielle's as a basis, which is set up as y=(# of hours)x+(bonus). This gives us y=12x+80. Now, as we need both their ys to be equal, we just set both equations equal to each other, making 15x+50=12x+80. Now, we solve for x, starting with 15x+50=12x+80, subtracting 12x from both sides to get 3x+50=80, subtracting 50 from both sides to get 3x=30, and dividing three from both sides to get x=10. To check, we just plug in our answer to both equations and see if the ys match up. With Danielle's equation, we get y=15(10)+50=150+50=200 and with David's equation, we get y=12(10)+80=120+80=200, proving that our answer is correct.
5 0
3 years ago
Read 2 more answers
You have 19 digs for your current volleyball season. There are 5 games left in the season. You want to break your previous recor
Charra [1.4K]

Answer:We must get more than 7 digs in the remaining 5 games  to break record of 26.


Step-by-step explanation:

Given situation:- Let  x represents the number of digs which we must get in the remaining 5 games to break your record ,and we have 19 digs for our current volleyball season.

To break  previous record of 26 digs in a season, we have to get more than 26 i.e. 19 digs added to x must be greater than 26

⇒x+19 ≥ 26

⇒x≥26-19⇒x≥7

Therefore,we must get more than 7 digs in the remaining 5 games  to break record of 26.


4 0
3 years ago
Which could be the dimensions of a rectangular prism to service area is less than 160 ft.² check all that apply
raketka [301]

Area of rectangular prism is given by:

A=2(wl+hl+lw)

where w=width h=height, l=length

checking for given options

1. 8 ft, by 4ft by 3ft

Area = 136 square feet

5. 3 feet by 5 feet by 7 feet

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so our first and last option matches the requirement of area less than 160 square feet.

3 0
4 years ago
Read 2 more answers
Need help, have to submit this very soon!!​
Brut [27]

Answer:

see explanation

Step-by-step explanation:

length = \frac{60}{8} = 7.5 in

scale factor = \frac{image}{original} = \frac{8}{60} = \frac{2}{15}

---------------------------------------------------

length = \frac{192}{4} = 48 cm

scale factor = \frac{omage}{original} = \frac{4}{192} = \frac{1}{48}

5 0
3 years ago
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