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Harman [31]
3 years ago
13

A circle has a center at (4, -7) and a radius of 4 units. What is the equation of this circle?

Mathematics
1 answer:
Softa [21]3 years ago
7 0

Answer:

(x-4)^2+(y+7)^2=16

Step-by-step explanation:

A circle with radius r and centre (a, b) has an equation:

(x-a)^2+(y-b)^2=r^2

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What is the answer to 2x to the power of 2 +x +1=0
KonstantinChe [14]

Answer:

x=-1

Step-by-step explanation:

x+1=0(squared).

x+1=0 (anything raise to the power 0 is 0

collect like terms =x=-1

therefore x=-1

4 0
3 years ago
Talk to me /:<br> pleases
spin [16.1K]

Answer:

5

Step-by-step explanation:

vvvvvvvvvvvvv

5 0
2 years ago
Read 2 more answers
5x7=<br> 5x7=5 x (_ + _)<br> 5x7= (5x _) + (5x_)<br> 5x7= _ + _<br> 5x7=
eimsori [14]
5x7=35
5x7=5x(5+2)
5x7=(5x3)+(5x4)
5x7=20+15
5x7=35

This is how I would do it :)
7 0
3 years ago
Read 2 more answers
Mr. Harrow has eight boys and six girls in his Honors Pre-calculus class. If he randomly chooses two students, one at a time, wh
Sergeu [11.5K]

Answer: 15/91 which is choice B

=================================================================

There are two methods to find this answer.

Method 1) We have 6 girls and 8+6 = 14 students. The probability of picking a girl is 6/14 = 3/7. After the first girl is chosen, we have 5 girls left out of 14-1 = 13 students overall. The probability of picking another girl (assuming the first selection was a girl) is 5/13. Multiply these probabilities: (3/7)*(5/13) = (3*5)/(7*13) = 15/91

--------------------

Method 2) We can use the nCr combination formula. Order does not matter.

We have nCr = 6 C 2 = 15 ways to pick 2 girls. See the attached image below for the steps (figure 1)

Out of nCr = 14 C 2 = 91 ways to pick 2 students. See the attached image below for the steps (figure 2)

So that's another way to get the answer 15/91.

5 0
3 years ago
Read 2 more answers
{(2,-4),(3,-4),(4,-4),(5,-4),(6,-4)}
Musya8 [376]

Answer:

I agree with Selena. Since the x's do not repeat, it is a function.

Step-by-step explanation:

3 0
3 years ago
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