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3 years ago

Can someone help me plz

Mathematics

2 answers:

Aleksandr-060686 [28]3 years ago

6 0

Answer:

communitive

Step-by-step explanation:

You changed +2 and -x

Alla [95]3 years ago

5 0

Answer:

Communitive.

Step-by-step explanation:

I believe I am right. I hope this helps you :)

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X 2 + y 2 - 10x - 8y + 1 = 0

Inessa [10]

Center: (5,4)

Radius: 2√10

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3 years ago

What postulate or theorem can be used to prove that ΔEFG ≅ ΔJHG?

OlgaM077 [116]

The answer Is C: SAS Congruence Postulate.

6 0

3 years ago

Find the equation of the circle with a diameter whose end points are (-1,-2) and (-3,2)

Sergeeva-Olga [200]

Answer:

The equation of the circle with a diameter whose end points are (-1,-2) and (-3,2) is

$x^{2} +y^{2}+4x-1=0$

Step-by-step explanation:

Explanation:-

Step 1:-

The equation of the circle having center and radius is

$(x-h)^2+(y-k)^2=r^2$

here center is (h,k) and radius is r

Given diameter whose end points are (-1,-2) and (-3,2)

The diameter of the circle is passing through the center of the circle

so center of the circle = midpoint of two end points

$(\frac{-1 +(-3) }{2} ,\frac{-2+2 }{2} )$

$(-2,0)$

therefore center (h,k) = (-2,0)

Step 2:-

we have to find the radius of the circle

the radius of the circle = the distance from center to the one end point

i.e., C P = r

Given one end point is P(-3,2) and center C(-2,0)

The distance formula of two points are

$\sqrt{(x_{2}-x_{1} ) ^{2}+ (y_{2}-y_{1} ) ^{2}}$

$r=\sqrt{{(-3)-(-1) ) ^{2}+ (2-(-2)) ^{2}}$

$r=\sqrt{5}$

Step 3:-

center (h,k) = (-2,0) and

radius $r=\sqrt{5}$

The standard form of circle equation

$(x-h)^2+(y-k)^2=r^2$

$(x-(-2))^2+(y-0)^2=\sqrt{5} ^2$

on simplification is

$x^{2} +y^{2}+4 x-1=0$

5 0

3 years ago

The length and width of a rectangle are in a 7:2 ratio. Find the width of the perimeter is 72.

scoray [572]

length = 7x
width = 2x

2(7x + 2x) = 72
7x + 2x = 72/2
9x = 36
x = 36/9
x = 4

width = 2x = 2 * 4 = 8 units

7 0

3 years ago

Find the x and y intercept for -2x-5y=30

Ahat [919]

Answer:

see below

Step-by-step explanation:

-2x-5y=30

To find the x intercept, set y =0 and solve for x

-2x-5*0=30

-2x = 30

Divide each side by -2

-2x/-2 = 30/-2

x =-15

To find the y intercept, set x =0 and solve for y

-2*0-5y=30

-5y = 30

Divide each side by -5

-5y/-5 = 30/-5

y = -6

3 0

3 years ago

Read 2 more answers