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GalinKa [24]
3 years ago
14

10. 10x + 5y = 15 y = 2x - 3

Mathematics
2 answers:
Likurg_2 [28]3 years ago
7 0

Answer:

10x + 5y = 15   =      y = -2x + 3

x (3/2,0) ; y (0,3)

Step-by-step explanation:

Slope is -2

TiliK225 [7]3 years ago
6 0

Answer:

if your looking for x then

Step-by-step explanation:

first add in the y by doing 10x+5(2x-3)=15 then 10x+10x-15=15 then 20x-15=15 then 20x=30 then divided by 20 for both sides which gets you x=30/20 or 1 1/3

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4 0
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Stephan's glass holds 450 millileters of milk. Farrah's glass holds 2/5 as much milk. How much milk does Farrah's glass hold?
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450*(2/5)


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3 years ago
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An animal shelter has cats and dogs. The ratio of cats to dogs is 3 to 5. If there are 15 dogs, how many cats are there?
MAXImum [283]
Nine is the correct answer
4 0
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A ball is thrown in the air from a height of 3 m with an initial velocity of 12 m/s. To the nearest tenth of a second, how long
stepladder [879]

Answer:  1.4 seconds

<u>Step-by-step explanation:</u>

The equation is: h(t) = at² + v₀t + h₀          where

  • a is the acceleration (in this case it is gravity)
  • v₀ is the initial velocity
  • h₀ is the initial height

Given:  

  • a = -9.81 (if it wasn't given in your textbook, you can look it up)
  • v₀ = 12
  • h₀ = 3

Since we are trying to find out when it lands on the ground, h(t) = 0

EQUATION:   0 = 9.81t² + 12t + 3

Use the quadratic equation to find the x-intercepts

                        a=-9.81, b=12, c=3

x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\\\\\\x=\dfrac{-(12)\pm \sqrt{(12)^2-4(-9.81)(3)}}{2(-9.81)}\\\\\\x=\dfrac{-12\pm 16.2}{-19.62}\\\\\\x=\dfrac{-12+ 16.2}{-19.62}=-0.2\qquad x=\dfrac{-12- 16.2}{-19.62}=\large\boxed{1.4}\\

Note: Negative time (-0.2) is not valid

4 0
3 years ago
The store paid $2.70 for a book and sold it for $6.20. What is the profit as a percent?
Alenkinab [10]

Answer:

129.6% profit

Step-by-step explanation:

1)Firstly in order to find the overall profit you take away $2.70 from $6.20 = $3.50

2)The next step is to put the profit over the amount paid = 3.50/2.70 = 35/27.

3)In order to find the percentaage you multiply 35/27 by 100 = 129.629 recurring. This rounded to 1 decimal place is 129.6%

Thank you for reading, please let me know if I've missed anything out!

5 0
2 years ago
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