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emmasim [6.3K]
3 years ago
8

Two circles have radii of 4 units and 6 units. What is the radius of a circle whose area is equal to the sum of the areas of the

two given circles?
Mathematics
1 answer:
Bumek [7]3 years ago
3 0

Answer:

Step-by-step explanation:

We that the area of a circle is Pi times r^2 where r is the radius

Let A be the area of the first circle and S the area of the second one and T the total one

A=4^2× Pi

S=6^2× Pi

T = Pi( 4^2 +6^2)

= Pi ( 16+36) = Pi× 52

52 is the radius square

So r = root square 52 = 2 root square 13

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Find the distance from the point (1, 4) to the line y = 1/3x – 3.
Otrada [13]

Answer: Distance between line and point =

4√5 -3/2√10

Step-by-step explanation:

Distance between the line is

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= √ (89+1)

= √90

= 3√10

Half of the line = 3/2√10

Distance of one side of the line and the point.

= √((9-1)²+(0-4)²)

= √((8)²+(-4)²)

=√64+16

= √80

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Distance between line and point =

4√5 -3/2√10

8 0
3 years ago
Which of the following is an example of a matched pairs design? A. A teacher calculates the average scores of students on a pair
Mashutka [201]

Answer:

B. A teacher compares the pre-test and post-test scores of students

Step-by-step explanation:

the answer is true, because it is a good example to compare the tests between students, we know that a matching pair design is a random model and is used when the experiment allows grouping subjects in pairs based on a variable and each pair will receive randomly a different handling, the answer A is not true because in the example all students are uniformly averaged and the variable is not correlated with subgroups, option c is incorrect because the variable was not randomized and generates classification bias and the option d is incorrect because the teacher compares a small sample as her class with a score of a total sample, but does not intervene on her students when selecting the corresponding group

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4 years ago
Suppose scores on exams in statistics are normally distributed with an unknown population mean and a population standard deviati
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this the answer of queastions

5 0
3 years ago
Read 2 more answers
Pls help me with #'s 13 and #15 with work pls so I know how u got it
frozen [14]
13. linear functions alwasys have x^1 as highest exonent for placeholder
we see that in D, we have 6x^2 which is quadratic, not linear

D is ansre

15. isolate y
emember you can do anything to an equaiton as long as you do it to both sides

12x-4y=20
add 4y to both sides
12x+4y-4y=20+4y
12x+0=4y+20
12x=4y+20
minus 20 both sides
12x-20=4y+20-20
12x-20=4y+0
12x-20=4y
divide both sides by 4
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3x-5=1y
3x-5=y
y=3x-5
why is it not listed, there is an error in the question, report the erre
5 0
3 years ago
At the Dream Cone ice cream shop, there are
pochemuha

Answer:

12 toppings

Step-by-step explanation:

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