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kolezko [41]
3 years ago
10

PLEASE HELP THIS WAS DUE 1 WEEK AGO AND IM SO STRESSED OUT

Mathematics
2 answers:
dusya [7]3 years ago
7 0
I know how you feel. Can I get a better picture
shepuryov [24]3 years ago
4 0
15. 72 cm
17. 120 in.
16. 625.5 cm

could you make me the brainiest? Please
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The equation of a circle is x^2 + y^2 -4x + 2y -11 =0 . What are the center and the radius of the circle? Show your work.
stira [4]

Answer:

Center: (2,-1)

Radius: 4 units

Step-by-step explanation:

Equation of the circle in standard form is:

x^{2}+y^{2}+2gx+2fy+c=0

The radius of this circle is located at (-g, -f) and its radius is equal to:

r=\sqrt{g^{2}+f^{2}-c}

The given equation of circle is:

x^{2}+y^{2}-4x+2y-11=0

Re-writing this equation in a form similar to the standard equation:

x^{2}+y^{2}+2(-2)x+2(1)y-11=0

Comparing this equation with standard equation we can say:

g= -2

f = 1

c = -11

So, the center of the circle will be located at (-g, -f) = (2, -1)

And the radius will be = \sqrt{g^{2}+f^{2}-c} =\sqrt{(-2)^{2}+(1)^{2}-(-11)} =\sqrt{16} =4

Thus the radius of the given circle is 4 units.

7 0
3 years ago
What are the two zeros of the quadratic function defined by the expression 9x2 - 4?
SIZIF [17.4K]
The zeros of this function is

x=2/3 , -2/3
8 0
3 years ago
How many factors of 10 are in 1,000
Tasya [4]

Answer:

100

Step-by-step explanation:

Because 100

x 10

= 1000

3 0
3 years ago
Read 2 more answers
Plsss help me!!!!
m_a_m_a [10]

Answer:

The answer to your problem is 10

Step-by-step explanation:

tony is 5 years younger than Marvin's age 1 year from now.

t = (m+1) - 5

t = m - 4

6 years ago tony was half as old as marvin was then.

t - 6 = 1/2(m - 6)

Get rid of the fraction, multiply both sides by 2

2(t-6) = m - 6

2t - 12 = m - 6

2t = m - 6 + 12

2t = m + 6

from the first statement, replace t with (m-4)

2(m-4) = m + 6

2m - 8 = m + 6

2m - m = 6 + 8

m = 14 is Marvin's present age

:

how old is tony now?

t = 14 - 4

t = 10 yrs is tony's age

7 0
3 years ago
The trapezoids are similar shapes. Find the lengths
lisabon 2012 [21]
X = 25
Y = 10.8
All I did is divide 30 by 50 which is .6 then I multiple by 18 which is 10.8 for y. Then 15 divided by .6 equals to 25
4 0
3 years ago
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