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2 years ago

Which ordered pair is a solution of the equation?

Mathematics

1 answer:

Sedaia [141]2 years ago

4 0

The ans is B (-1, -5)
Thus y +5=2(x+1)
Substitute (-1, -5) into the equation
-5 +5=2(-1+1)
0=0

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Please help with this question!! I need serious help!!

asambeis [7]

Answer:

<h2>The circumference is multipled by 4.</h2>

Step-by-step explanation:

The formula of an area of a circle"

$A=\pi r^2$

The formula of a circumference of a circle:

$C=2\pi r$

The area multipled by 16:

$16A=16\pi r^2\\\\16A=\pi(4^2r^2)\\\\16A=\pi(4r)^2$

The radius has increased fourfold, therefore:

$C'=2\pi(4r)=4(2\pi r)=4C$

The circumference is multipled by 4.

You can calculate the area and check the circumference:

$r=11.6\ in\\\\A=\pi(11.6)^2=132.56\pi\\\\16A=(16)(134.56\pi)=2152.96\pi\ in^2$

Calculate the radius:

$\pi r^2=2152.96\pi$ <em>divide both sides by π</em>

$r^2=2152.96\to r=\sqrt{2152.96}\\\\r=46.4\ in$

Calculate the circumference of both circles:

$r=11.6\ in\\\\C=2\pi(11.6)=23.2\pi\ in$

$r=46.4\ in\\\\C'=2\pi(46.4)=92.8\pi\ in$

$\dfrac{C'}{C}=\dfrac{92.8\pi}{23.2\pi}=4\to C'=4C$

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2 years ago

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2 years ago

A boat travels 30 miles up the river in the same amount of time it takes to travel 38 miles down the same river. If the current

Ksenya-84 [330]

X miles per hour - <span> speed of the boat in still water
(x - 2) - speed up the river
(x + 2) - speed down the river
</span>
$\frac{30}{x - 2}$ = $\frac{38}{x + 2}$
30 * (x + 2) = 38 * (x - 2)
30x + 60 = 38x - 76
- 8x = - 136
x = 17 miles per hour - <span>the speed of the boat in still water.</span>

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2 years ago

How to divide 4.48 ÷7

Rina8888 [55]

Answer:

Step-by-step explanation:

4.48/7

7 into 4 (0 times)

Bring next number down 4.48 ⬇️

7 into 44 (6 times, 2 left over)

Bring next number down 4.48 ⬇️

7 into 28 (4 times)

Answer 0.64

I'm always happy to help :)

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3 years ago

Read 2 more answers

The weekly cost (c) of manufacturing (x) number of remotes is given by the equation below. what is the cost to manufacture 2500

IRISSAK [1]

C= 2000 + 3(2500)
C= 2000 + 7,500
C= $9,500

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3 years ago