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zalisa [80]
3 years ago
14

HELP I HAVE TEN MINUTES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Flura [38]3 years ago
8 0
No


Explanation

Do it on your own
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What is the radius of a circle whose equation is x2 + y2 + 8x – 6y + 21 = 0?
s344n2d4d5 [400]

Answer:

2 units

Step-by-step explanation:

The given equation of the circle is:

x^{2} + y^{2}+8x-6y+21=0

The general equation of the circle is:

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

Comparing the given equation with the general equation we can say:

g = 4

f = -3

c = 21

The formula for radius of the circle is:

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

Using these values of the given circle, we get:

radius=\sqrt{(4)^{2}+(-3)^{2}-21}\\\\radius=\sqrt{4}\\\\radius=2

Therefore, the length of radius of the given circle is 2.

3 0
3 years ago
What number can be used as a common denominator for the fractions 1/4 and 5/6
Korvikt [17]

Answer:

<em>12</em>

Step-by-step explanation:

<em>1/4= 3/12</em>

<em>5/6=10/12</em>

<em>So they both have a common denominator of 12!</em>

Hope this helps, have a good day. c;

8 0
3 years ago
Sandra is making a sign for her chess club. Two possible designs for the base of the
klasskru [66]
I was only able to come up with the answer of 1. Here is my work (don’t mind the messy handwriting I was writing with my finger on my phone)

5 0
3 years ago
BRAINLIEST + POINTS! Please explain
ivolga24 [154]

Answer:

Option D. \$83.75  

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

A=P(1+\frac{r}{n})^{nt}  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest  in decimal

t is Number of Time Periods  

n is the number of times interest is compounded per year

in this problem we have  

t=30\ years\\ P=\$187.45*0.10=\$18.745\\ r=0.05\\n=12  

substitute in the formula above  

A=\$18.745(1+\frac{0.05}{12})^{12*30}=\$83.75  

3 0
3 years ago
A system of equations is shown below.
Alja [10]

You can use the process elimination to solve. In other words, subtract or add the equations like normal.

5x + 2y = -15

+ 2x - 2y = -6

Because there is a 2y and -2y, we can add both equations to eliminate the y so that we can figure out what x is:

5x + 2x = 7x

2y + (-2y) = 0

-15 + (-6) = -21

We now have 7x = -21

Divide all by 7 to get x = -3

Plug in -3 to any of the two equations. I will use the second equation:

2(-3) - 2y = -6

-6 - 2y = -6

-2y = 0

y = 0

This means that the solution to the system of equations is (-3, 0) in the form of (x, y).

4 0
3 years ago
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