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2 years ago

I rlly need help on this

Mathematics

2 answers:

rusak2 [61]2 years ago

8 0

Answer: 130, sorry if its wrong

Step-by-step explanation:

8 x 5 = 40 --> 40 x 3 1/4 = 130

mestny [16]2 years ago

5 0

Answer:

130 in.

Step-by-step explanation:

you can do it 3 ways

5x8=40 40x3 1/4=130

8x3 1/4=26 26x5=130

5x3 1/4=16 1/4 16 1/4x8=130

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Answer: 6144m^2

Step-by-step explanation:

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3 years ago

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3 years ago

The general form of the equation of a circle is x2 + y2 + 42x + 38y − 47 = 0. The equation of this circle in standard form is .

Readme [11.4K]

Answer:

(-21,-19)

$\sqrt{849}$

Standard form

Step-by-step explanation:

We are given the equation of circle

$x^2+y^2+42x+38y-47=0$

General equation of circle:

$x^2+y^2+2gx+2fy+c=0$

Centre: (-g,-f)

Radius: $\sqrt{g^2+f^2-c}$

Compare the equation to find f, g and c from the equation

$g\rightarrow 21$

$f\rightarrow 19$

$c\rightarrow -47$

Centre: (-21,-19)

Radius (r) $=\sqrt{21^2+19^2+47}=\sqrt{849}$

Standard form of circle:

$(x+21)^2+(y+19)^2=849$

The centre of circle at the point (-21,-19) and its radius is $\sqrt{849}$ .

The general form of the equation of a circle that has the same radius as the above circle is standard form.

4 0

3 years ago

Read 2 more answers

What is the solution set of - x = -8?

Ivenika [448]

$-x=-8\\x=8$

7 0

3 years ago

Read 2 more answers

Solve the following system of equations. What is the x-value of the solution?

Leni [432]

Answer:

x = 1

Step-by-step explanation:

<u>Step 1: Choose one of the equations to solve for y:</u>

x - y + 1 = 0

(-y) / -1 = (-1 - x) / -1

y = 1 + x

<u>Step 2: Plug in y into either equation</u>

3x + 2(1 + x) = 7

3x + 2 + 2x - 2= 7 - 2

5x / 5 = 5 / 5

x = 1

Answer: x = 1

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3 years ago