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Lady bird [3.3K]
3 years ago
12

Evaluate the expression. 5 - (4 - 2 - (6-6)) 8 2 5 3

Mathematics
2 answers:
Elodia [21]3 years ago
8 0

Answer:

3

Step-by-step explanation:

Simplify the following:

5 - (4 - 2 - (6 - 6))

6 - 6 = 0:

5 - (4 - 2 - 0)

-0 = 0:

5 - (4 - 2 + 0)

4 - 2 + 0 = 4 - 2:

5 - 4 - 2

4 - 2 = 2:

5 - 2

5 - 2 = 3:

Answer:  3

Doss [256]3 years ago
3 0

Answer: 3

Step-by-step explanation:

5−(4−2−(6−6))

=3

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A scientist has a sample of bacteria that initially contains 10 million microbes. They observe the sample and finds that the num
sergiy2304 [10]

Answer:

M(t) = 6.7 * 10⁷ (67 million)

Minutes (t) =55

Step-by-step explanation:

1. Write an exponential equation that represents M, the total number of bacterial microbes in millions, as a function of t, the number of minutes the sample has been observed.

For answering this question, we will use the following formula:

M(t) = B₀ * g ^(t/m), where:

•M(t) represents the total number of bacterial microbes in millions.

• B₀ represents the initial population of bacteria in millions.

• g represents the growth factor.

• t represents the total number of minutes we will observe the bacteria growing.

• m represents the time in minutes it takes to the growth factor g to occur.

2. Then, determine how much time, to the nearest minute, will pass until there are 67 million bacterial microbes.

M(t) = B₀ * g ^(t/m)

Replacing with the values we know:

6.7 * 10⁷ = 10⁷ * 2 ^(t/20)

6.7 = 2 ^(t/20) (Dividing by 10⁷ at both sides)

ln 6.7 = ln 2 ^(t/20)

ln 6.7 = t/20 ln 2

ln 6.7/ ln 2 = t/20

t = ln 6.7/ln 2 * 20

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3 0
2 years ago
The sum of two numbers is 48 and the difference is 20. what are the number?​
rosijanka [135]

Answer:

x = 34; y = 14

Step-by-step explanation:

Step 1: Make the equations

x + y = 48

x - y = 20

Step 2: Solve the equations

x + y = 48

x - y = 20

2x = 68

x = 34

34 + y = 48

y = 14

8 0
3 years ago
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