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3 years ago

What is the rate of change for the graph?

Mathematics

2 answers:

Reptile [31]3 years ago

8 0

Answer: 2

Step-by-step explanation:

Rate of change is another way of saying slope. Since slope is rise/run, this functions slope is 2/1 or just 2

Alina [70]3 years ago

7 0

The answer is 2 duhhhhhh

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How do you translate this sentence into an inequality?

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5/8x $\leq$ 15

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3 years ago

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Which counterexample shows that the conjecture "All animals that can fly are birds" is false?

QveST [7]

It seems like you forgot to post the answer choices. However, bats are one animal where they can fly but they aren't birds. So this is one counter-example to prove the claim false. Another example would be any flying insects.

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4 years ago

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Solve the equation using the quadratic formula.

Brrunno [24]

Hello:
x²+3x-2 = 0
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3 years ago

Factor the expression. 2x^2 + 3x - 9

Pepsi [2]

Answer:

(2x-3)(x+3)

Step-by-step explanation:

The factors of the expression are (2x-3) and (x+3).

4 0

4 years ago

What should a size of a sample be in order to have a margin of error of 4% for a 90% confidence level from a population with a s

vagabundo [1.1K]

Answer:

We need a sample size of 2,071,800 or higher.

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 Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, we 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.

In this problem:

We need a sample size of n or higher, when $M = 0.04, \sigma = 35$ . So

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

$0.04 = 1.645*\frac{35}{\sqrt{n}}$

$0.04\sqrt{n} = 1.645*35$

$0.04\sqrt{n} = 57.575$

$\sqrt{n} = 1439.375$

$\sqrt{n}^{2} = (1439.375)^{2}$

$n = 2,071,800$

We need a sample size of 2,071,800 or higher.

6 0

3 years ago