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babunello [35]
3 years ago
5

Norma bought a plastic bag that contains 100 ballons the lable says that there are 20 each of blue,yellow, red, ,green and orang

e ballons what is the probability that the ballon will be either red or blue?
Mathematics
1 answer:
Volgvan3 years ago
7 0

Answer:

It is 120

Step-by-step explanation:

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Can someone help me with this problem
stepan [7]
The answer is D. 3 and 17. 
3 + 17 = 20. They have a sum of 20.
17 - 3 = 14. They also have a difference of 14.
Hope I helped!
7 0
3 years ago
If the right side of the equation dy dx = f(x, y) can be expressed as a function of the ratio y/x only, then the equation is sai
melomori [17]

Answer:

 y = x*sqrt(Cx - 1)

Step-by-step explanation:

Given:

                                  dy / dx = (x^2 + 5y^2) / 2xy

Find:

Solve the given ODE by using appropriate substitution.

Solution:

- Rewrite the given ODE:

                               dy/dx = 0.5(x/y) + 2.5(y/x)

- use substitution y = x*v(x)

                               dy/dx = v + x*dv/dx

- Combine the two equations:

                                v + x*dv/dx = 0.5*(1/v) + 2.5*v

                                x*dv/dx = 0.5*(1/v) + 1.5*v

                                x*dv/dx = (v^2 + 1) / 2v

-Separate variables:

                                 (2v.dv / (v^2 + 1) = dx / x  

- Integrate both sides:

                                 Ln (v^2 + 1) = Ln(x) + C

                                 v^2 + 1 = Cx

                                 v = sqrt(Cx - 1)

- Back substitution:

                                (y/x) = sqrt(Cx - 1)

                               y = x*sqrt(Cx - 1)

                         

3 0
3 years ago
A store sells posters. Each poster costs the same amount. During a sale, the store reduces the price of each poster by $1. 25. C
grandymaker [24]

Answer:

4.44

Step-by-step explanation:

I used a calculater to divide $17.76 by 4

4 0
3 years ago
Read 2 more answers
Multiply <br>(Please help)<br>(x+4)²​
frosja888 [35]

Answer:

{(x + 4)}^{2}  \\ (x + 4)(x + 4) \\  {x}^{2}  + 4x + 4x + 16 \\  {x}^{2}  + 8x + 16

I hope I helped you^_^

7 0
3 years ago
After a 5% price cut, the price of a liter of petrol was 85.5 cents. What was the price per liter before the price cut?
alexgriva [62]
Answer: 89.775

Working in picture
8 0
3 years ago
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