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Lera25 [3.4K]
4 years ago
11

HELP PLEASE problems 1, 2, 3, 4, 5, 6​

Mathematics
1 answer:
Svetllana [295]4 years ago
4 0

Answer:

See explanation

Step-by-step explanation:

If the parent function is y=f(x), then

  • the graph of the function y=f(x-a) is translated a units to the right graph of the function y=f(x);
  • the graph of the function y=f(x+a) is translated a units to the left graph of the function y=f(x);
  • the graph of the function y=f(x)+a is translated a units up graph of the function y=f(x);
  • the graph of the function y=f(x)-a is translated a units down graph of the function y=f(x).

Q1. The graph of the function g(x)=x^2+5 is translated 5 units up graph of the function f(x)=x^2.

Q2. The graph of the function h(x)=x^2+10 is translated 10 units up graph of the function f(x)=x^2.

Q3. The graph of the function j(x)=x^2-5 is translated 5 units down graph of the function f(x)=x^2.

Q4. The graph of the function g(x)=-2x^2+4 is reflected across the x-axis, stretched by a factor of 2 and translated 4 units up graph of the function f(x)=x^2.

Q5. The graph of the function h(x)=-\dfrac{1}{4}x^2-1 is reflected across the x-axis, stretched by a factor of \frac{1}{4} and translated 1 unit down graph of the function f(x)=x^2.

Q6. The graph of the function k(x)=\dfrac{1}{3}x^2+5 is stretched by a factor of \dfrac{1}{3} and translated 5 units up graph of the function f(x)=x^2.

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Step-by-step explanation:

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answer C  the odd and positif function

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A savings accouny has 50 dollars in it at the start of the year and 20 dollars is deposited each week. After x weeks, there are
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A town's population went from 25,800 to 42,600 in 15 years. What was the percent of changes?
melomori [17]
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You then calculate the increase as a percentage of the original population; 25,800.

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3 years ago
A bus travels on an east-west highway connecting two cities A and B that are 100 miles apart. There are 2 services stations alon
melamori03 [73]

Answer:

51/4

Step-by-step explanation:

To begin with you have to understand what is the distribution of the random variable. If X represents the point where the bus breaks down. That is correct.  

X~ Uniform(0,100)

Then the probability mass function is given as follows.

f(x) = P(X=x) = 1/100  \,\,\,\, \text{if} \,\,\,\, 0 \leq x \leq 100\\f(x) = P(X=x) = 0  \,\,\,\, \text{otherwise}

Now, imagine that the D represents the distance from the break down point to the nearest station. Think about this, the first service station is 20 meters away from city A, and the second station is located  70 meters away from city A then the mid point between 20 and 70  is (70+20)/2 = 45 then we can represent D as follows

D(x) =\left\{ \begin{array}{ll}  x  & \mbox{if } 0\leq x \leq 20 \\  x-20 & \mbox{if } 20\leq x < 45\\                70-x & \mbox{if } 45 \leq x \leq 70\\                x-70 & \mbox{if } 70 \leq x \leq 100\\ \end{array}\right.

Now, as we said before X represents the random variable where the bus breaks down, then we form a new random variable Y = D(X), Y is a random variable as well, remember that there is a theorem that says that

E[Y] = E[D(X)] = \int\limits_{-\infty}^{\infty} D(x) f(x) \,\, dx

Where f(x) is the probability mass function of X. Using the information of our problem

E[Y] = \int\limits_{-\infty}^{\infty}  D(x)f(x) dx \\= \frac{1}{100} \bigg[ \int\limits_{0}^{20} x dx +\int\limits_{20}^{45} (x-20) dx +\int\limits_{45}^{70} (70-x) dx +\int\limits_{70}^{100} (x-70) dx  \bigg]\\= \frac{51}{4} = 12.75

3 0
4 years ago
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