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2 years ago

A pattern of ordered pairs is shown.

Mathematics

2 answers:

Anna007 [38]2 years ago

8 0

Answer:

A. is the answer

Step-by-step explanation:

The first numbers are adding 2 and the second number is adding 3, hope this helped, plz brainiest.

Sophie [7]2 years ago

8 0

Answer: C

Step-by-step explanation:

X’s are going by +2 and y’s by +3

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Which type of transformation to the triangle has occurred from graph 1 to graph 2 in this diagram

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Answer:

B. Rotation

Step-by-step explanation:

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3 years ago

Given the points (-2,-4) and (-3,-5) what is the slope

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1/1

Step-by-step explanation:

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3 years ago

-2 + y ≤ -3 on number line

liq [111]

I think it should be something like this

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3 years ago

There are 50 apple trees in an orchard. each tree produces 800 apples. for each additional tree planted in the orchard, the outp

nordsb [41]

<span>apples = (50+x)(800-10x)
= (40000-500x+800x-10x^2)
= -10x^2 +300x + 40000
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15 trees should be added</span>

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3 years ago

A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 66 students usi

d1i1m1o1n [39]

Answer:

99% confidence interval = [-35.47,-26.53]

Step-by-step explanation:

For Method 1:

$n_1=66,\mu_1=54.9,\sigma_1=6.04$

For Method 2:

$n_2=110,\mu_2=85.9,\sigma_2=16.44$

We need to find the 99% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.

Step 1: Find the point estimate for the true difference between the population means.

$Difference=\mu_1-\mu_2$

$Difference=54.9-85.9$

$Difference=-31.0$

Therefore the point estimate for the true difference between the population means is -31.

Step 2: Find margin of error at 99% confidence.

From the standard normal table the critical value of z at 99% confidence = 2.576.

The formula for margin of error:

$M.E.=z^*\times \sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}}$

Substitute the values.

$M.E.=2.576\times \sqrt{\dfrac{(6.04)^2}{66}+\dfrac{(16.44)^2}{110}}}$

$M.E.\approx 4.47$

Therefore, the margin of error is 4.47.

Step 3: Find 99% confidence interval.

$C.I.=(\mu_1-\mu_2)\pm M.E.$

$C.I.=-31.0\pm 4.47$

$C.I.=-35.47,-26.53$

Therefore, the 99% confidence interval is [-35.47,-26.53].

3 0

3 years ago