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2 years ago

What is the equation of a circle with center at (3,-4) and radius of 3

Mathematics

1 answer:

koban [17]2 years ago

8 0

Answer:

$\displaystyle [x - 3]^2 + [y + 4]^2 = 9$

Explanation:

Accourding to one of the circle equations, $\displaystyle [x - h]^2 + [y - k]^2 = r^2,$ the centre of the circle is represented by $\displaystyle [h, k].$ Moreover, all negative symbols give you the OPPOCITE TERMS OF WHAT THEY <em>REALLY</em> ARE, so you must pay cloce attention to which term gets which symbol. Another thing you need to know is that the radius will ALWAYS be squared, so no matter how your equation comes about, make sure that the radius is squared.

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When solving a system of inequalities, which of the following methods are used? A.guess and check

yarga [219]

Answer:

Option B - graphing is the correct answer.

Step-by-step explanation:

To solve a system of inequalities we need graphing. Inequality tells us about the relative size of two values. When we graph the x and y co-ordinates, the solution is not the drawn line, but the area of the coordinate plane that satisfies the inequality. In inequalities, multiple solutions can be possible.

Plug and chug method does not a complete solution, it only tells where a point belongs. Guess and check does not apply here.

7 0

3 years ago

Jenny made $315.25 for 8 hours of work. How much would Jenny make for 40 hours of work

bagirrra123 [75]

If Jenny made $315.25 for 8 hours of work:

Then it means that she made:
$312.25/8 hours = $39.41 per hour.

If Jenny works for 40 hours, then she will make:

40 hours × $39.41 = $1,576.25

Please mark my answers as the Brainliest if you find my explanations/solution helpful :)

6 0

3 years ago

Eric has 183 coins all of them are nickels and dimes. If the total value of the coins is 14.45, how many of each denomination co

FromTheMoon [43]

Answer:

77 nickels

106 dimes

Step-by-step explanation:

Let there be n nickes and d dimes

Since there are 183 coins, we can write:

n + d = 183

Also, the value of nickel is 0.05 and dime is 0.1, total value is 14.45, so we can write:

0.05n + 0.1d = 14.45

Solving 1st equation for n, we have:

n = 183 - d

Putting this into 2nd equation and solving for d:

$0.05n + 0.1d = 14.45\\0.05(183-d) + 0.1d = 14.45\\9.15-0.05d+0.1d=14.45\\0.05d=5.3\\d=106$

There are 106 dimes

Since, n = 183 - d

n = 183 - 106

n = 77

There are 77 nickels

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3 years ago

Help!!!! Will give brainliest!!!!

Gwar [14]

Answer:

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3 years ago

What is the slant height of a square pyramid that has a surface area of 189 square feet and a side length of 7 feet?

mafiozo [28]

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3 years ago

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