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2 years ago

If there are 44 successful outcomes in a sample with a size of 80, what is the

Mathematics

1 answer:

Lubov Fominskaja [6]2 years ago

7 0

Answer:

The sample proportion is 0.55

Step-by-step explanation:

Given that:

Successful outcomes = 44

Size of sample = 80

We will divide the number of successful outcomes by size of sample to find the sample proportion.

Sample proportion = $\frac{Successful\ outcomes}{Size\ of\ sample}$

Sample proportion = $\frac{44}{80}\\$

Sample proportion = 0.55

Hence,

The sample proportion is 0.55

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What are the real zeros of x^3+4x^2-9x-36

Katyanochek1 [597]

Answer:

$x = -4\\x = -3\\x = 3$

Step-by-step explanation:

To find the real zeros you must match the function to zero and factor the expression.

We have a polynomial of degree 3.

We try to group the terms to perform the factorization

$x ^ 3 + 4x ^ 2-9x-36 = 0\\\\x ^ 2(x + 4) - 9(x + 4) = 0$

Now we take (x + 4) as a common factor

$(x + 4)(x ^ 2 -9) = 0$

If we have an expression of the form $(a ^ 2-b ^ 2)$ we know that this expression is equivalent to:

$(a ^ 2-b ^ 2) = (a + b)(a-b)$

In this case

$a = x\\b = 3$

So:

$(x ^ 2 -9) = (x + 3)(x-3)$

Finally:

$x ^ 3 + 4x ^ 2-9x-36 = (x + 4)(x + 3)(x-3) = 0$

The solutions are:

$x = -4\\x = -3\\x = 3$

6 0

2 years ago

B. A solution to the equation f(n)=−3 is 5.

Alenkasestr [34]

Answer:

f(n) = 1

Step-by-step explanation:

Another answer for -3. FxN= -3

4 0

2 years ago

PLEASE HELP ME! Find 15/4+(−4/13). Write your answer as a fraction in simplest form.

MArishka [77]

Answer:

3 and 23

Step-by-step explanation:

4 0

2 years ago

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Solve the inequality. -4x + 15 < -21

Dmitriy789 [7]

Answer:

x>9

Step-by-step explanation:

-4x + 15 < -21

Subtract 15 from each side

-4x + 15-15 < -21-15

-4x < -36

Divide each side by -4, remembering to flip the inequality

-4x/-4> -36/-4

x >9

6 0

2 years ago

M<br>+ 8 = 15 <br>find the number m represent

leva [86]

Answer:

m=7

Step-by-step explanation:

15-8=7

therefore m=7

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2 years ago

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