2 years ago

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Mathematics

1 answer:

Mumz [18]2 years ago

6 0

Answer:

Step-by-step explanation:

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What is the value of the expression? 9^2÷(-3)^0

stiv31 [10]

Step 1. Simplify 9^2 to 81
81 <span>÷ (-3)^0
Step 2. Use Rule of Zero: x^0 = 1
81 </span><span>÷ 1
Step 3. Simplify
81</span>

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3 years ago

Kai has 130 beads to make necklaces. there or 100 blue beads. there are 20 red beads. what fraction of the beads are blue?what f

Dominik [7]

100/130 = b
20/130 = r

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3 years ago

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In a laboratory, the count of bacteria in a certain experiment was increasing at the rate of 2.5 % per hour find the bacteria at

Daniel [21]

9514 1404 393

Answer:

5187

Step-by-step explanation:

At the end of 1 hour, the count is 2.5% greater than at the beginning.

5060 + 2.5% × 5060 = 5060 +126.5 = 5186.5

The count at the end of the hour was about 5187.

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2 years ago

Jim was thinking of a number. Jim adds 20 to it, then doubles it and gets an answer of 99.2. What was the original number?

azamat

Alright, lets get started.

Jim was thinking of a number.

Suppose the number Jim was thinking, is x.

Jim adds 20 to it means number will be = $x+20$

And Jim doubles it, means $2*(x+20)$

Jim gets 99.2 and as per us, he gets $2*(x+20)$

So, making them equal

$2(x+20)=99.2$

$2x+40=99.2$

Subtracting 40 in both sides

$2x+40-40=99.2-40$

$2x=59.2$

$x=29.6$

It means the original number is 29.6. : Answer

Hope it will help :)

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2 years ago

What are the solutions of the quadratic equation x^2=9x+6

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See Quadratic Formula and Determinant's/Delta's formula

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