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Eduardwww [97]
3 years ago
6

ANSWER AND EXPLAIN PLEASE ILL MARK BRAINLIEST

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
8 0
Solve for x by plugging in y, then plug x back in
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Suppose you just purchased a digital music player and have put 15 tracks on it. After listening to them you decide that you like
Lilit [14]
The given case is an example of permutation problem because the order is important given that you should like the first two songs. The sample space is calculated through the equation, 
                                       15P2 = 210
Then, there are 3 songs that you liked, the probability of picking 2 out of them is,
                                         3P2 = 6
Dividing the latter by the earlier result will give us an answer of 1/35. 
8 0
3 years ago
What is the axis of symmetry of the function f(x) = –(x + 9)(x – 21)?
ludmilkaskok [199]
First, we have to realize that this is factored form, so we have to put this in standard quadratic form using FOIL, which is a rule mandating how we multiply the numbers here. F stands for First, which means the first number inside the parentheses for both of them, then O means the first number in the first quantity(fancy word for parentheses) multiplied by the last number of the second quantity, and so forth. When you are done, you combine like terms

anyway, you end up with x²-12x-189, but you have to inverse all numbers because of the parentheses in front, so it becomes -x²+12x+189.

Now you can find the axis of symmetry uisng the equation -b=2a (oh yeah, I forgot to mention: the standard quadratic form is a(x)²+b(x)+c already). So you do -12 / -2, which then becomes 6.

The axis of symmetry is 6
3 0
3 years ago
Which system of the equation is represents by the graph?<br><br><br>​
pashok25 [27]
Sorry just needed points to use this app
3 0
2 years ago
What is a formula for the nth term of the given sequence? 20,23, 26...​
lord [1]

Answer:

17 + 3n

Step-by-step explanation:

20, 23,26 ..............

This is an arithmetic series

First term = a = 20

Common difference = second term -  first term

                               d = 23 - 20 = 3

nth terms = a + (n-1)*d

               = 20 + (n -1) *3

               = 20 + n*3 - 1*3

              = 20 + 3n - 3

               = 20 - 3 + 3n

              = 17 + 3n

6 0
2 years ago
What are the slope and y-intercept for the graph of y – 3x = -1?
Liula [17]

Answer:

Slope (m) = 3, y-intercept (b) = -1

Step-by-step explanation:

First, we need to write the equation in y = mx + b.

To do this, add 3x to both sides.

y = 3x - 1 is your result.

Now, we have everything we need to do determine our slope and y-intercept in just this equation alone.

Remember, m = slope and b = y-intercept.

In this equation:

m = 3

b = -1

So your slope is 3, and your y-intercept is -1

5 0
2 years ago
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