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slamgirl [31]
2 years ago
14

Please help me , it's only 5 questions thanks​

Mathematics
2 answers:
k0ka [10]2 years ago
6 0

Answer:

I don't know this answer

son4ous [18]2 years ago
6 0

Answer:

  1. 3,822
  2. 2,568
  3. 672
  4. Doesn't know the answer. Sorry
  5. 1,185

Step-by-step explanation:

Can't do the solution but you can do it.

Just learn how to solve the multiplication with partitioning strategy, grid method, and expanded method. You can search it and learn it by watching and understanding how to solve all of them. But I want to say sorry, because I can't answer the number 4 cause I don't know to do it. Really sorry.

Hope it helps

#LetsStudy

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Step-by-step explanation:

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Find the numbers b such that the average value of f(x) = 7 + 10x − 9x2 on the interval [0, b] is equal to 8.
barxatty [35]

Answer:

The numbers b such that the average value of f(x) = 7 +10\cdot x - 9\cdot x^{2} on the interval [0, b] is equal to 8 are b_{1} \approx 1.434 and b_{2} \approx 0.232.

Step-by-step explanation:

The mean value of function within a given interval is given by the following integral:

\bar f = \frac{1}{b-a}\cdot \int\limits^b_a {f(x)} \, dx

If f(x) = 7 +10\cdot x - 9\cdot x^{2}, a = 0, b = b and \bar f = 8, then:

\frac{1}{b}\cdot \int\limits^b_0 {7+10\cdot x -9\cdot x^{2}} \, dx = 8

\frac{7}{b}\int\limits^b_0 \, dx  + \frac{10}{b}  \int\limits^b_0 {x}\, dx - \frac{9}{b}  \int\limits^b_0 {x^{2}}\, dx = 8

\left(\frac{7}{b} \right)\cdot b + \left(\frac{10}{b} \right)\cdot \left(\frac{b^{2}}{2} \right)-\left(\frac{9}{b} \right)\cdot \left(\frac{b^{3}}{3} \right) = 8

7 + 5\cdot b - 3\cdot b^{2} = 8

3\cdot b^{2}-5\cdot b +1 = 0

The roots of this polynomial are determined by the Quadratic Formula:

b_{1} \approx 1.434 and b_{2} \approx 0.232.

The numbers b such that the average value of f(x) = 7 +10\cdot x - 9\cdot x^{2} on the interval [0, b] is equal to 8 are b_{1} \approx 1.434 and b_{2} \approx 0.232.

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3 years ago
How do you find the distance between two coordinate points on the graph?
borishaifa [10]

Answer:

point of intercept

Step-by-step explanation:

measure x and y axis to see where they cross

6 0
3 years ago
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