3 years ago

In terms of factor sums define composite numbers

Mathematics

1 answer:

faltersainse [42]3 years ago

7 0

Composite numbers are numbers that have the same set of factors

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Solve the system of equations.

postnew [5]

Step-by-step explanation:

y = x² + x + 5

y = x + 1

x² + x + 5 = x + 1

x² + 4 = 0

x² = -4

x = ±√-4 undefined

No solutions

Option → B

4 0

2 years ago

Christina "I know that 3 is greater than 2 1/2 So, -3 must be greater than -2 1/2"

Reika [66]

Answer:

Breft is correct

5 0

3 years ago

Read 2 more answers

What is the probability of rolling an even number when rolling a 6-sided die? A) 3 B) 1 2 C) 1 3 D) 1 4

fomenos

Answer:

B 1/2

Step-by-step explanation:

6 0

3 years ago

How many women must be randomly selected to estimate the mean weight of women in one age group? We want 90% confidence that the

ki77a [65]

Answer:

155 women must be randomly selected.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.05 = 0.95$ , so Z = 1.645.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The population standard deviation is known to be 28 lbs.

This means that $\sigma = 28$

We want 90% confidence that the sample mean is within 3.7 lbs of the populations mean. How many women must be sampled?

This is n for which M = 3.7. So

$M = z\frac{\sigma}{\sqrt{n}}$

$3.7 = 1.645\frac{28}{\sqrt{n}}$

$3.7\sqrt{n} = 1.645*28$

$\sqrt{n} = \frac{1.645*28}{3.7}$

$(\sqrt{n})^2 = (\frac{1.645*28}{3.7})^2$

$n = 154.97$

Rounding up:

155 women must be randomly selected.

4 0

3 years ago

Does anyone know how to factor this?

NNADVOKAT [17]

3(4x-3)(x+6) is the answer

6 0

3 years ago