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SCORPION-xisa [38]
3 years ago
7

-9+8 * 8+(-1) * -6+(-2) *

Mathematics
2 answers:
max2010maxim [7]3 years ago
7 0

1. -1

2. 7

3.-8

i hope these are the answers

klemol [59]3 years ago
6 0

Answer:

-1,7, - 8

Step-by-step explanation:

-9 +8 =-1

8 +(-1)=7

-6 +(-2)=-8

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The number of bacteria in a certain culture doubled every hour. If there were 30 bacteria present in the culture initially, how
vichka [17]

Answer:

The number of bacteria after 8th will be 3840

Step-by-step explanation:

Given the initially 30 bacteria present in the culture.

Also, the number of bacteria got doubled every hour.

So, using the equation

A=A_0r^{n-1}

Where A is number of bacteria after n hours.

A_0 is bacteria present initially.

r is the common ration, in our problem it is given that bacteria doubles every hour. So, r=2

And n is the number of hours. In our problem we need amount of bacteria at the end of 8th hours. So, n=8

Plugging values in the formula we get,

A=30(2)^{8-1}\\A=30\times 2^7\\A=30\times 128\\A=3840

So, number of bacteria after 8th will be 3840

3 0
3 years ago
Point Q’ is the image of Q (3,-4) under a reflection across the x-axis
7nadin3 [17]

Answer:

Q' (-3,4)

Step-by-step explanation:

A reflection across the x-axis would mean that only the x value of the point would change. This means that the y value would still be 4. To find the x value, just flip it to a negative. The negative of 3 is -3

5 0
3 years ago
Read 2 more answers
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Step-by-step explanation:

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6 0
3 years ago
6x square +11x-10 <br>Factories ​
vova2212 [387]

Answer:

(2x+5)(3x-2)

Step-by-step explanation:

6x²+11x-10

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7 0
3 years ago
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Answer:

492,630

Logic is the only explanation I have for you...

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