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elena-s [515]
3 years ago
5

_____ means to write an expression in simpler form.​

Mathematics
2 answers:
Rzqust [24]3 years ago
8 0

Answer:

Simplify the Expression?

Step-by-step explanation:

harina [27]3 years ago
8 0

Answer:

To simplify the expression.

Step-by-step explanation:

To simplify the expression means to write the expression in a similar form. When you simplify you combine like terms, group like terms and try to narrow an expression down to its least complicated form. Hope this helps :)

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A lawn service owner is testing new weed killers. He discovers that a particular weed killer is effective 89% of the time. Suppo
marissa [1.9K]

Answer:

The 90% confidence interval for p is (0.8236, 0.9564). The upper confidence limit for p is 0.9564.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

He discovers that a particular weed killer is effective 89% of the time. Suppose that this estimate was based on a random sample of 60 applications.

This means that \pi = 0.89, n = 60

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.89 - 1.645\sqrt{\frac{0.89*0.11}{60}} = 0.8236

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.89 + 1.645\sqrt{\frac{0.89*0.11}{60}} = 0.9564

The 90% confidence interval for p is (0.8236, 0.9564). The upper confidence limit for p is 0.9564.

3 0
3 years ago
Read 2 more answers
Reggie wanted to compare his grades with the national averages. Which measure of central tendency would be the best for Reggie t
nadya68 [22]

Answer:

D

Step-by-step explanation:

The mean is usually the best measure of central tendency to use when your data distribution is continuous and symmetrical, such as when your data is normally distributed.

3 0
3 years ago
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What value of c makes the equation true?
8_murik_8 [283]
Comparing forms, you see that
  4 = ∛c

The value of c is found by cubing both sides of this equation.
  4³ = c = 64
3 0
3 years ago
A principal of $2600is invested at 6.75% interest, compounded annually. How much will the investment be worth after 14 years
dedylja [7]

Answer:

$6488.19

Step-by-step explanation:

To solve this problem we use the compounded interest formula:

amount  =  principal(1 + (r \n))^({n}{t})

a = $2600(1+(0.0675/1))¹*¹⁴

a = $6488.19

8 0
4 years ago
Derive this identity from the sum and difference formulas for cosine:
DiKsa [7]

Step-by-step explanation:

½ [cos(a − b) − cos(a + b)]

Using sum and difference formulas:

½ [cos a cos b + sin a sin b − (cos a cos b − sin a sin b)]

Distribute the negative:

½ (cos a cos b + sin a sin b − cos a cos b + sin a sin b)

Combine like terms:

½ (2 sin a sin b)

Simplify:

sin a sin b

4 0
3 years ago
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