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2 years ago

What is the equation of a circle with center (-7,4) and radius 8?

Mathematics

2 answers:

enot [183]2 years ago

7 0

The answer to this question is
B. (x+7)²+(y-4)²=64

I hope this helps!!!!!!!

marishachu [46]2 years ago

4 0

The answer is b, switch the coordinate signs and then square the 8 because it’s square rooted to get the radius

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Please help me solve these problems

vovangra [49]

Will do first question of each concept only because the rest of the questions are the same concept (the same few repeat but whatever).

1. Total angle = (n - 2) * 180 --> 4 * 180 = 360°

70 + 130 + 120 + θ = 360 --> 320 + θ = 360 --> θ = 40

4. Total angle = (10 - 2) * 180 --> 8 * 180 = 1440

1440/10 = 144°

6. Interior: (n - 2) * 180 --> 10 * 180 = 1800

Exterior: 12 * 180 = 2160 --> 2160 - 1800 = 360

9. (n - 2) * 180 --> 3 * 180 = 540

90 + 90 + 150 + 160 + θ = 540 --> 490 + θ = 540 --> θ = 50

13. Interior: (n - 2) * 180 --> 2 * 180 = 360

Exterior: n * 180 - (n - 2) * 180 --> 180n - 180n + 360 --> 360 (always the same)

16. 7r + 4r + 8r + 5r = 360 --> 24r = 360 --> r = 15

5 0

3 years ago

2ax-b=cx+d solve for x

Alexxandr [17]

Answer:

x = (d + b) / (2a - c)

Step-by-step explanation:

2ax-b = cx+d

2ax - cx = d + b

x (2a-c) = d + b

x = (d + b) / (2a - c)

7 0

3 years ago

A store charges their customers based on the number of items that they buy. Jane bought four items and was charged $15 and Georg

mojhsa [17]

Answer:

A) $f(x) = 3x + 3; f(10) = 33$

Step-by-step explanation:

$39 = 3x + 3 \\ \\ 36 = 3x \\ \\ 12 = x$

$15 = 3x + 3 \\ \\ 12 = 3x \\ \\ 4 = x$

* $33 = 3x + 3 \\ \\ 30 = 3x \\ \\ 10 = x$

** From what the problem said, we know that we selected the correct equation.

I am joyous to assist you anytime.

7 0

3 years ago

A student takes an exam containing 1414 multiple choice questions. The probability of choosing a correct answer by knowledgeable

Readme [11.4K]

Answer:

0.0082 = 0.82% probability that he will pass

Step-by-step explanation:

For each question, there are only two possible outcomes. Either the students guesses the correct answer, or he guesses the wrong answer. The probability of guessing the correct answer for a question is independent of other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$