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skelet666 [1.2K]
3 years ago
13

There are 10 fish in the pond.Some of them swim away.There are 3 fish left.How many fish are left in the pond? Show all your thi

nking and write a subtraction to represent the problem.
Mathematics
2 answers:
OleMash [197]3 years ago
4 0

10

Just because the fish swam away doesn't mean they left the pond

schepotkina [342]3 years ago
3 0
Ya there are 10 fish in pond....
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Determine the longest interval in which the given initial value problem is certain to have a unique twice-differentiable solutio
AnnZ [28]

Answer:

y'' + \frac{7}{t} y = 1

For this case we can use the theorem of Existence and uniqueness that says:

Let p(t) , q(t) and g(t) be continuous on [a,b] then the differential equation given by:

y''+ p(t) y' +q(t) y = g(t) , y(t_o) =y_o, y'(t_o) = y'_o

has unique solution defined for all t in [a,b]

If we apply this to our equation we have that p(t) =0 and q(t) = \frac{7}{t} and g(t) =1

We see that q(t) is not defined at t =0, so the largest interval containing 1 on which p,q and g are defined and continuous is given by (0, \infty)

And by the theorem explained before we ensure the existence and uniqueness on this interval of a solution (unique) who satisfy the conditions required.

Step-by-step explanation:

For this case we have the following differential equation given:

t y'' + 7y = t

With the conditions y(1)= 1 and y'(1) = 7

The frist step on this case is divide both sides of the differential equation by t and we got:

y'' + \frac{7}{t} y = 1

For this case we can use the theorem of Existence and uniqueness that says:

Let p(t) , q(t) and g(t) be continuous on [a,b] then the differential equation given by:

y''+ p(t) y' +q(t) y = g(t) , y(t_o) =y_o, y'(t_o) = y'_o

has unique solution defined for all t in [a,b]

If we apply this to our equation we have that p(t) =0 and q(t) = \frac{7}{t} and g(t) =1

We see that q(t) is not defined at t =0, so the largest interval containing 1 on which p,q and g are defined and continuous is given by (0, \infty)

And by the theorem explained before we ensure the existence and uniqueness on this interval of a solution (unique) who satisfy the conditions required.

7 0
3 years ago
Read 2 more answers
The movie theater is twice as far from the school as the mall. If the movie theater is to the right of the school, which locatio
stellarik [79]
I see no map in front of me, but if we assume that the school is at coordinates of (0,0), and since the distance to the movie theater is to the right and double that of the mall, then we can say that the movie theater is along the x-axis, and  between the I and IV quadrants, and the location on the axis is Md2, or Mall Distance times 2.
7 0
3 years ago
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The PTO is selling raffle tickets to raise money for classroom supplies. A raffle ticket costs $3. There is 1 winning ticket out
matrenka [14]

Answer:

A) 0.54

B) 4.32

C) 2.4

D)  336

Step-by-step explanation:

A)Expected value (you) = (84 × 3) × \frac{1}{140} × (0.3)× \frac{139}{140}

                                       = 0.54

B) Expected value (you) 8 tickets = 0.54 × 8

                                                       = 4.32

C) Expected value ( for PTO) = ( 3 - 84) × \frac{1}{140} + ( 3 - 0 ) × \frac{139}{140}

                                                = 2.4

D) For 140 raffle tickets = 2.4 × 140

                                       = 336

4 0
2 years ago
Can someone help me for this question...please​
lina2011 [118]

Answer:

No value of x

Step-by-step explanation:

SEE the image for solution.

HOPE it helps

Have a great day

3 0
2 years ago
8 times blank equals 48
krek1111 [17]
Answer: 8 times 6 equals 48
3 0
3 years ago
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