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Gekata [30.6K]
3 years ago
11

What is the circumference of a 9 m circle?

Mathematics
1 answer:
zhenek [66]3 years ago
5 0
From what I know its 56.52m
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Which of the following are solutions to the equation below? Check all that apply. 9x^2-64=0
nikdorinn [45]

Answer:

E. -8/3

F. 8/3

Step-by-step explanation:

9x^2-64=0

Add 64 to each side

9x^2-64+64 = 0+64

9x^2 =64

Divide each side by 9

9x^2/9 = 64/9

x^2 = 64/9

Take the square root of each side

sqrt(x^2) = ±sqrt(64/9)

We know that sqrt(a/b) = sqrt(a)/sqrt(b)

x = ±sqrt(64)/sqrt(9)

x = ± 8/3

4 0
3 years ago
A calculator that cost $60 in 1980 now sells for $10. What was the percent of decrease​
Romashka-Z-Leto [24]

Answer: 16.6%

Step-by-step explanation:

$60 divided by 6 = $10

so divide 100 by 6 and you get about 16.6

I Hope this Helps!

4 0
3 years ago
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Which pair of complex numbers has a real-number product? (1 + 2i)(8i) (1 + 2i)(2 – 5i) (1 + 2i)(1 – 2i) (1 + 2i)(4i)
kupik [55]

Answer:

(1+2i)(1-2i)

Step-by-step explanation:


5 0
3 years ago
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What is the y-intercept of the function,represented by the table of values below?
Hitman42 [59]

Answer:

8

Step-by-step explanation:

So the y-intercept is not given by your table because there is no x that is listed as 0.

But don't fret; we can still find it.

Let's see if the function is linear by seeing if we have the same slope per two points in the table.

For the first pair ( the points (-2,16) and (1,4) ), x increased by 3 and the y decreased by 12 so the slope there is -12/3=-4.

Now looking at the next pair ( the points (1,4) and (2,0) ), x increased by 1 while y decreased by 4 so the slope is -4/1=-4.

So the function appears to be linear.

So the slope-intercept form of a line is y=mx+b where m is slope and b is y-intercept.

We already found the slope from earlier which is m=-4.

So the equation so far is y=-4x+b.

Now to find b, the y-intercept, we need to use a point (x,y) on the line along with y=-4x+b.

Let's see my favorite on the list of points is (2,0).

y=-4x+b with (x,y)=(2,0)

0=-4(2)+b

0=-8+b

8=b

So the y-intercept is 8.

8 0
3 years ago
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Jacob wants to get a video gamecrental account. The rental store charges 10 per month charges no matter how many video games wer
san4es73 [151]

Answer:

add

Step-by-step explanation:

4 0
3 years ago
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