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77julia77 [94]
2 years ago
15

Help me please......

Mathematics
1 answer:
Ganezh [65]2 years ago
5 0
64.99x0.35=22.75 64.99-22.75=42.24
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What value of y makes this equation true <br><br> 14•y =126
Veseljchak [2.6K]

Answer:

y = 9

Step-by-step explanation:

to solve this equation, you first have to divide:

14 * y = 126

/14         /14

y = 9

and there is the answer. If you need to prove that y = 9, just input it into the equation.

14 * 9 = 126

126 = 126

4 0
3 years ago
The number of typing errors made by a typist has a Poisson distribution with an average of three errors per page. If more than t
damaskus [11]

Answer:

0.6472 = 64.72% probability that a randomly selected page does not need to be retyped.

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}

In which

x is the number of sucesses

e = 2.71828 is the Euler number

\mu is the mean in the given interval.

Poisson distribution with an average of three errors per page

This means that \mu = 3

What is the probability that a randomly selected page does not need to be retyped?

Probability of at most 3 errors, so:

P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)

In which

P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}

P(X = 0) = \frac{e^{-3}*3^{0}}{(0)!} = 0.0498

P(X = 1) = \frac{e^{-3}*3^{1}}{(1)!} = 0.1494

P(X = 2) = \frac{e^{-3}*3^{2}}{(2)!} = 0.2240

P(X = 3) = \frac{e^{-3}*3^{3}}{(3)!} = 0.2240

Then

P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) = 0.0498 + 0.1494 + 0.2240 + 0.2240 = 0.6472

0.6472 = 64.72% probability that a randomly selected page does not need to be retyped.

3 0
2 years ago
+
kherson [118]

answer is b.Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
The function f(x)=x^2 is graphed on the coordinate grid.
Aleksandr [31]
<h3>Answer:</h3>
  • graphed below.
<h3>Explanation:</h3>
  • vertex: (0, 0)

other points:

<u>x    y</u>

-2  12

-1   3

0   0

1    3

2   12

7 0
2 years ago
Read 2 more answers
A direct variation function contains the points( -8,-6) and (12,9). Which equation represents the function ?
natulia [17]

Answer:

y = (3/4)x

Step-by-step explanation:

1)  Find the slope of the line.  As we go from ( -8,-6) to (12,9), x increases by 20 and y increases by 15.  Thus, the slope, m, is m = rise / run = 15/20 = 3/4

2) Recognize that the y-intercept is zero (0) because this is direct variation; the line goes thru the origin.

3) write the equation of the line:  y = mx + b becomes y = (3/4)x

6 0
2 years ago
Read 2 more answers
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