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VladimirAG [237]
3 years ago
12

The value of a collectible is changing such that dv/dt = 2t/(sqrt(t^2+1)) given in 4/year, and t is the number of years from 200

0. The value of the collectible in 2000 was $300.
1. Calculate the value of the object in 1990
a. How do you find the value given a rate equation, and a point?
b. What method did you use?
Mathematics
1 answer:
alina1380 [7]3 years ago
5 0

Answer:

Diviértete tratando de conseguirlo porque no sé, así que sí, pero no

Step-by-step explanation:

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I have just one question, could someone please answer it?? (see linked file)
Annette [7]

The solution is x=1 and y=-2

Further explanation:

Given equations are:

\frac{7}{2}x-\frac{1}{2}y=\frac{9}{2}\\3x-y=5

Multiplying equation no. 1 with 2 will give us:

7x-y=9       Eqn 3

From equation no 2:

3x-y=5\\-y=5-3x\\y=3x-5

Putting the value of y in eqn 3

7x-(3x-5)=9\\7x-3x+5=9\\4x=9-5\\4x=4\\\frac{4x}{4}=\frac{4}{4}\\x=1\\Putting\ x=1\ in\ equation\ 2\\3(1)-y=5\\3-y=5\\-y=5-3\\-y=2\\y=-2\\

The solution is x=1 and y=-2

Keywords: Linear equations, Solution set

Learn more about linear equations at:

  • brainly.com/question/561665
  • brainly.com/question/537998

#LearnwithBrainly

8 0
3 years ago
A store sells the basic model of a phone for $60 and the upgraded model for $200. It costs the store $10 to buy each basic model
ivolga24 [154]

Answer:

6

Step-by-step explanation:

(6*200)+(10*60)=1800

(6*50)+(10*10)=400

5 0
2 years ago
Create a model to show that 2(2x+3y)=4x+6y
Tom [10]
You would first do 2 multiplied by 2x and that would give you 4x, then you would do 2 multiplied by 3y which would give you 6y, you would put 4x under 2x and put 6y under 3y and bring down your addition symbol 
4 0
3 years ago
Which ratios are proportional to 14 : 21? Choose all answers that are correct.
aliina [53]
14/21 equals to 2/3 if divide both number by 7. 
so A is the answer
7 0
3 years ago
Read 2 more answers
Plz help don't get it
MatroZZZ [7]
Would help but I can't see the full page sorry man/woman
8 0
3 years ago
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