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algol13
3 years ago
9

What is the value of x?

Mathematics
2 answers:
Lemur [1.5K]3 years ago
8 0
Triangle SRQ is similar to triangle STR because the corresponding angles are equal.
SR/ST=SQ/SR
SR²=ST*SR=9*(9+16)=225
SR=15
Answer B is correct.
bogdanovich [222]3 years ago
3 0

Answer:

The answer is 20 units.

Step-by-step explanation:


You might be interested in
What is this, how do i solve it, what the answer
umka2103 [35]

Answer:

1

Step-by-step explanation:

This is a function where you have to plug in the value you are given for x.  In this case, you are given 1 as your value (after the semicolon).  So, you set up your equation like so: (1)^3 + 3(1)^2 -7(1) + 4

(1)^3=1

3(1)^2 = 3

-7(1) = -7

4= 4

so you have 1+3-7+4 which is 1

8 0
3 years ago
Consider the ODE, dy dx = y 2 1 + x (2) subject to condition y = 1 when x = 0, use your Euler code from class (modified if neces
makkiz [27]

Answer:

Computation.

Step-by-step explanation:

I'm not really sure if that's the analytical solution of the inital value problem,

because y(0)=11-ln(1-0)(3)=11. Howevwer, let us procede with the given values...

Let us assume that we are going to use euler with n=2 (two steps) and h=0.2(the size of each step)

The update rules of the Euler Methode are

X_i = X_{i-1}+h=X_0+ih

m_i=\dfrac{dY}{dX} \biggr \rvert_{x_i} \\\\Y_{i+1}=m_i\cdot h+y_i

Since the initial value problem tells us that Y=1 when X=0, we know that

X_0=0 and that Y_0=1. Then, we have

X_0=0\\\\X_1=0.2\\\\X_2=0.4

and

Y_0=1\\\\m_0=21 \cdot Y_0 + X_0 \cdot 2=21 \cdot 1 + 0=21\\\\Y_1=0.2 \cdot 21 + 1 =5.2\\\\m_1=21 \cdot Y_1 + X_1\cdot 2=21 \cdot 5.2 + 0.2 \cdot 2=109.6\\ \\Y_2=m_1 \cdot h + Y_1 = 109.6 \cdot 0.2 + 5.2= 27.12

which gives us the points (0,1), (0.2, 5.2) and (0.4, 27.12).

Now, since we want to compare the analyticaland the Euler result, we first compute the value of y=11-ln(1-x)(3) for the values x=0, 0.2 and 0.4. We get that

y(0)=11-\ln(1-0)(3)=11-ln(1)(3)=11\\\\Y(1)=11-\ln(1-0.2)(3)=11.67\\\\Y(2)=11-\ln(1-0.4)(3)=12.53

and we compute Y(i)-Y_i for each i.

It holds

Y(0)-Y_0=11-1=10\\\\Y(1)-Y_1=11.67-5.2=6.47\\\\Y(2)-Y_2=12.53-27.12=-14.59

which tells us that we have a really bad approximation, as I already stated there must be a mistake in the analytical solution since the intial values don't coincide. Also note that the curve that we get using the euler methose is growing faster than the analitical solution.

4 0
3 years ago
Only the Fahrenheit one plz
makkiz [27]
The formula given is:
F = 1.8C + 32
The temperature C is given as -20
So, all you have to do is plug the given C temperature in the formula to get the corresponding F temperature as follows:
F = 1.8(-20) + 32 = -36 + 32 = -4 degrees Fahrenheit
6 0
3 years ago
Describe the error Sarah made when simplifying the expression shown. -5(x-2)=-5x-10
prisoha [69]
The answer will be 1100283738292
8 0
3 years ago
Rewrite the expression 4+ the square root of 16-(4)(5) decided by 2 as a complex number in standard form a+bi
bija089 [108]

Answer: 4 + \sqrt{4i}

Step-by-step explanation:

4+ \sqrt{16-(4)(5)} = 4 + \sqrt{16-20} =4 + \sqrt{-4} = 4 + \sqrt{4i}

if it matters then simply further...

4 + \sqrt{4i} = 4 + 4i^{1/2}

8 0
3 years ago
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