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Sliva [168]
3 years ago
6

Just one bacterium, dividing every 20 minutes could produce nearly 5 billion bacteria in one day. Could this be correct or a mis

take​
Mathematics
1 answer:
faust18 [17]3 years ago
5 0
The equation (1•2)^72 (72 20 minute periods in a day) would produce way more than 5 billion a day
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Write an equation for a circle with<br> a center at (9 -2) and has a<br> radius of 7.
fenix001 [56]
The equation of a circle is given as:

(x-a)^2 + (y- b)^2 = r^2  where (a, b) is the center.

(x-9)^2  = x^2 -18x + 81 - ----(i)
(y+2)^2 =y^2 + 4y +4      ------ (ii)
r^2 = 49                          ------ (iii)

Adding equation (i) and (iii) 
x^2 + y^2 - 18x + 4y + 85 -----(iv)

Equating equation (iv) and (iii)

 <span>x^2 + y^2 - 18x + 4y + 85 = 49

Arrange the equation:

</span> <span>x^2 + y^2 - 18x + 4y + 36 = 0
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I hope this helps

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8 0
3 years ago
A field is a rectangle with a perimeter of 1240 feet. The length is 400 feet more than the width. Find the width and length of t
Wewaii [24]

Answer:  The length is 510 and the width is 110.

Step-by-step explanation:

To find the area of a rectangle, you will have to add the 2 times the length plus 2 times the width because  a rectangle have 4 sides. Two widths and two  lengths.

You can now use the formula  P= 2l + 2w  

were P is the perimeter , l is the length, and w is the width.

the length is 400 more than the width, so we can represent that by the equation,  l = w + 400  

And now we know that the width is w.

So now we will input the perimeter, length, and into the formula to solve for w.

1240 = 2(w + 400) + 2w

1240 = 2w + 800 + 2w

1240 = 4w + 800

-800            -800

   440 = 4w

    w = 110

L= 110 + 400

L = 510  

Check :

1240 = 2(510) + 2(110)

1240 = 1020 + 220

1240 = 1240

5 0
2 years ago
4.875 = d - 2.125 <br><br>what do I do here?​
spayn [35]

Answer:

d=7

Step-by-step explanation:

7-2.125= 4.875

7 is your answer as it balances both sides of the equation.

i got seven by adding 2.125. to 4.875

4 0
2 years ago
Read 2 more answers
Manuel has 18 yards of fabric to make table runners. It takes yard to make each runner. The expression that models the situation
nirvana33 [79]
He can make 18 table runners.
6 0
3 years ago
Read 2 more answers
Which system of equations could be used to determine how many of each coin you have
kirza4 [7]
<h3>Answer: Choice A</h3>

0.10d + 0.05n = 2.25

d = 2n

================================================

Explanation:

n = number of nickels

d = number of dimes

we have twice as many dimes as nickels, so we could have something like 18 dimes and 9 nickels. Algebraically we would write d = 18 and n = 9. The equation that fits this is d = 2n. The answer is between A and B at this point.

We rule out choice B since the 0.05d is incorrect. It should be 0.10d to represent the total value of all the dimes.

Choice A is correct

d = number of dimes

0.10d = value of all the dimes in dollars

n = number of nickels

0.05n = value of all the nickels in dollars

0.10d + 0.05n = total value from both coins combined

2.25 =  total value from both coins combined

0.10d + 0.05n = 2.25

8 0
3 years ago
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