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3 years ago

Please help!!! thank you

Mathematics

2 answers:

fiasKO [112]3 years ago

3 0

Answer:

Step-by-step explanation:

140 divided by 5 is 28

224 divided by 8 is 28

480 divided by 15 is 28

taurus [48]3 years ago

3 0

5 can go into 140, 28 times

8 can go into 224, 28 times

15 can go into 420, 28 times

28 is the relationship

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3 years ago

R^2 + 64 = r^2 + 10r + 25

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Answer:

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Step-by-step explanation:

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3 years ago

Using the following equation, find the center and radius of the circle. You must show all work and calculations to receive credi

adoni [48]

Answer:

$r = 4$

The center is:

(2, -4)

Step-by-step explanation:

We have the following equation

$x^2 - 4x + y^2 + 8y = -4$

The general equation of a circle has the following form

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

Where r is the radius and the point (h, k) is the center of the circle

To transform the given equation in the general equation of a circumference we must use the method of square completions

Step 1

$(x^2 - 4x) + (y^2 + 8y) = -4$

Step 2

Add and subtract $(\frac{b}{2})^2$ For an equation of the form

$ax^2 +bx +c$

$(x^2 - 4x +4)-4 + (y^2 + 8y +16) -16= -4$

Step 3 Factor the expressions within the parentheses

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

Step 4 Simplify

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

$(x-2)^2 + (y+4)^2= 4^2$

Finally

$r = 4$

The center is:

(2, -4)

7 0

3 years ago

Factor the expression. 4d + 12

Oksanka [162]

4d+12
Lets put out the 4 because it can also be pulled out of 12
4(d+3)

Shoutout to @Mdarrow01

Have an amazing day!

7 0

3 years ago

Read 2 more answers

3x + 1/5y - 2 = 0 A. y=15x + 10 B.y=15x - 10 C.y=-15x +10 D.y=-15x-10

Svetach [21]

Answer:

Step-by-step explanation:

You need to isolate the y variable. The first thing you need to do is move the 2 and 3x to the other side of the equation.

3x + 1/5y - 2 = 0

1/5y = -3x +2

Then you need to get rid of the 1/5 so you multiply both sides equation by the reciprocal of 1/5 which is 5/1 or 5.

y = ( -3x +2) 5

then you distribute the 5 to get

y = -15x+10

8 0

3 years ago

Read 2 more answers