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3 years ago

10

A circle is centered at the point (-7,-1) and passes through the point (8, 7). The radius of the circle is ___ units. The point

(-15, __ ) lies on this circle

1 answer:

trapecia [35]3 years ago

5 0

Answer:

(x + 7)2 + (y + 1)2 = r2.

To get we use point (8, 7): (8 + 7)2 + (7 + 1)2 = r2, r2 = 225 + 64 = 289 = 172.

So, equation of circle: (x + 7)2 + (y + 1)2 = 289

Step-by-step explanation:

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Find the common difference if the 8th term is 55 and the first term is 13

Vlad [161]

Answer:

Step-by-step explanation:

Equation

L = a + (n - 1)*d

Givens

L = 55

a = 13

n =8

Solution

55 = 13 + (8 - 1)*d Combine

55 = 13 + 7d Subtract 13 from both sides

55 - 13 = 7d

42 = 7d Divide by 7

d = 6

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3 years ago

What formula do i use when it tells me to find the area with a given circumference? If you know please give an example as well,

liberstina [14]

Answer:

Step-by-step explanation:

A = C^2 / 4 x pi

so if the circumfernce was 10 you would square it to make it 100 and then you would do 4 x pi to get 12.57 ( rounded).

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3 years ago

Let f(x) = 3x + 5 and g(x) = x2.

Nadusha1986 [10]

Answer:

f(x^2)=3x^2+5

Step-by-step explanation:

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4 0

3 years ago

What expression is equivalent to 9(3x + 8)? *

Nat2105 [25]

Step-by-step explanation:

This is what it is equal to:

9×3x=27x

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Therefore it will be:

$27x + 72$

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8 0

2 years ago

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99 POINTS, NEED HELP WITH ALGEBRA

Tanya [424]

1 is in picture above.

2.

$average \: rate = \frac{f(4) - f(1)}{4 - ( - 1)} = \frac{5}{4 - ( - 1)} = 1$

3. In the picture...

4. In the picture...

5. Parts A and B are true.

6.

$average \: rate = \frac{f(0) - f( - 10)}{0 - ( - 10)} = \frac{( - 6) - 184}{0 - ( - 10)} = \frac{ - 190}{10} = - 19$

7. The axis symmetry equation of

$y = a {x}^{2} + bx + c$

is

$x = \frac{ - b}{2a}$

So it would be x=-3/4

8.

$y = {(x - 6)}^{2} + 10$

T=(6, 10) vertex coordinates...

4 0

3 years ago

Read 2 more answers