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White raven [17]
3 years ago
5

Can the sum of two negative numbers ever be positive?

Mathematics
2 answers:
N76 [4]3 years ago
7 0
No
two negatives equal positive, and one negative and one positive is i think negative
leva [86]3 years ago
6 0
There can be  a negative sum 
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Timothy built a base for a circular tabletop. The base can support a tabletop with a radius of at least 6 inches, but not more t
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12×π=38 is the area of the tabletop
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Lily is going for a run. she runs at a speed of 4 miles per hour for 6.4
Nezavi [6.7K]

Answer:

She runs for 1.6 hours

Step-by-step explanation:

For this, one way to do it is to just set 1 hour over 4 miles equal to x hours for 6.4 miles. The reason this is done is because if the speed is constant that means the rate stays the same, which means the ratio of miles to hours should always be the same, so the two ratios must be equivalent.

1/4 = x/6.4

Multiply both sides by 6.4 to get x by itself:

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Hope that helps!

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4 years ago
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8 0
3 years ago
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The indicated function y1(x) is a solution of the given differential equation. Use reduction of order or formula (5) in Section
lisabon 2012 [21]

Answer:

\therefore y_2(x)=-\frac{e^{-6x}}{8}

The general solution is

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Step-by-step explanation:

Given differential equation is

y''-4y'+4y=0

and y_1(x)=e^{2x}

To find the y_2(x) we are applying the following formula,

y_2(x)=y_1(x)\int \frac{e^{-\int P(x) dx}}{y_1^2(x)} \ dx

The general form of equation is

y''+P(x)y'+Q(x)y=0

Comparing the general form of the differential equation to the given differential equation,

So, P(x)= - 4

\therefore y_2(x)=e^{2x}\int \frac{e^{-\int 4dx}}{(e^{2x})^2}dx

           =e^{2x}\int \frac{e^{-4x}}{e^{4x}}dx

           =e^{2x}\int e^{-4x-4x} \ dx

            =e^{2x}\int e^{-8x} \ dx

            =e^{2x}. \frac{e^{-8x}}{-8}

           =-\frac{e^{-6x}}{8}

\therefore y_2(x)=-\frac{e^{-6x}}{8}

The general solution is

y=c_1e^{2x}-c_2.\frac{e^{-6x}}{8}

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3 years ago
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slava [35]

Answer:

19 is the square root of 361.

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3 years ago
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