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ale4655 [162]
3 years ago
11

Jennifer kite is 16 feet long and she is 7 feet from the tree. How long of a ladder in feet will she need to get her kite out of

tree
Mathematics
2 answers:
navik [9.2K]3 years ago
7 0

Answer:

9

Step-by-step explanation:

subtract

Dmitry_Shevchenko [17]3 years ago
3 0
9 feet is the answer
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2k•squared• + 7 - 15<br> factoring ax•squared•+bx+c
Rainbow [258]
Calculate Δ = b^2 -4ac => Δ = 169 => k1 = 3/2; k2 = -5 => 2k^2 + 7k - 15 = 2*(k -3/2)(k+5) = (2k - 3)(k+5);
6 0
4 years ago
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

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

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}

4 0
3 years ago
Helps if look at pic
Ann [662]
The answer is 90 (B)
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The formula for surface area of a sphere: A = 4 pi r^2.  
Since the radius is 30 m then A = 4pi30^2. 
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5 0
3 years ago
Read 2 more answers
Help me with this question please
sp2606 [1]
We add 548 and 225 which would be 773
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3 years ago
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