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3 years ago

Factor: w^2 + 16w + 63

Mathematics

2 answers:

Alina [70]3 years ago

7 0

Answer:

(w+7)(+9) I worked it out but not sure how to attach do yea

Step-by-step explanation:

oee [108]3 years ago

7 0

Answer: (w + 7) (w + 9)

Step-by-step explanation: factor using the ac method

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Forty-seven percent of fish in a river are catfish. Imagine scooping out a simple random sample of 25 fish from the river and ob

Alexxx [7]

Question options:

The standard deviation is 0.0998. The 10% condition is not met because there are less than 250 fish in the river.

The standard deviation is 0.0998. The 10% condition is met because it is very likely there are more than 250 fish in the river.

The standard deviation is 0.9002. The 10% condition is met because it is very likely there are more than 250 fish in the river.

The standard deviation is 0.9002. The 10% condition is not met because there are less than 250 fish in the river.

We are unable to determine the standard deviation because we do not know the sample mean. The 10% condition is met because it is very likely there are more than 250 fish in the river

Answer:

The standard deviation is 0.0998. The 10% condition is met because it is very likely there are more than 250 fish in the river

Explanation:

Formula to calculate standard deviation = √p(1-p)/n

Given p= population proportion

n= sample size

From the question,

We are given p(population proportion of catfish in the river)= 0.47

n(sample size of fish collected from river) = 25

The standard deviation using the formula above = √0.47(1-0.47)/25

= 0.0998

The 10% condition demands that a sample size be not less than 10% of the population

To check if the 10% condition was met, we know that a river will likely have up to 250 fish in it and so,

10% of 250= 0.10×250=25 fish

Therefore the option B chosen is correct

8 0

3 years ago

The diagram shows a circular pond, of radius r metres, surrounded by a circular path.The circular path has a constant width of 1

Alenkasestr [34]

The formula for calculating the area of a circle is expressed as;

A = πr²

Area of the pond = πr²
Area of the path = Area of the path + pond - area of pond

Area of path = π(r+1.5)² - πr²

Since the area of the path is equal to the area of the pond, hence;

π(r+1.5)² - πr² = πr²

Add πr² to both sides

π(r+1.5)² - πr² + πr² = πr² + πr²

π(r+1.5)² = 2πr²

(r+1.5)² = 2r²

Expand the parenthesis

r²+3r + 2.25 = 2r²

r²+3r + 2.25 - 2r² = 0

-r² + 3r + 2.25 = 0

r² - 3r - 2.25 = 0

Multiply through by 2

2r² - 6.0r - 4.5 = 0

This proves the required equation

Learn more on area of composite figures here: brainly.com/question/15981553

3 0

3 years ago

Find the value of X.

SCORPION-xisa [38]

Answer:

3.96ft

Step-by-step explanation:3.3/5 is .66 so that is the scale factor and multiply 6 by .66 gets you 3.96 hope this helps god bless

6 0

3 years ago

1/3 Solve a = 3/5 O a = 3/4 O a = 4/3 O a = 5/3

qwelly [4]

Sheeesh theeeeee answerrrrrrrr isssssss a=3/4

8 0

3 years ago

Look at picture please :)

erma4kov [3.2K]

Answer:

To find the amount that it accelerated, you need to find the change in the mph. First you would subtract 70 and 10 to find that number. That tells you the total amount of change. Then to figure out how much it would be per second you divided that number by the total number of seconds (12).

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers