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3 years ago

The population of bacteria in an

Mathematics

1 answer:

pashok25 [27]3 years ago

7 0

Answer:

491.30 bacteria

Step-by-step explanation:

70% per day

day 1) 100 bacteria × 70% = 170 bacteria

day 2) 170 bacteria × 70% = 289 bacteria

day 3) 289 bacteria × 70% = 491.30 bacteria

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Esther cut a square paper vertically to make two rectangle pieces. Each rectangle had a perimeter of 63 inches.

mariarad [96]

Answer:

Step-by-step explanation:

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3 years ago

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JB's music store is offering a 20% discount on all CDs and DVDs, meaning 80% of the price remains. If the discounted price of a

podryga [215]

Answer:

$21 is the answer

Step-by-step explanation:

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3 years ago

The sum of two numbers is 39 and the difference is 3. What are the numbers?

frosja888 [35]

Answer: 21 & 18

Step-by-step explanation:

Sum of two numbers is 39

Difference is 3

Let the numbers be x & y

X+y=39........equation 1

X-y=3...........equation 2

X=3+y............equation 3

Substitute equation 3 into equation 1

(3+y)+y=39

3+y+y=39

3+2y=39

2y=39-3

2y=36

Y=36/2

Y=18

Substitute for y in equation 2

X-y=3

X-18=3

X=3+18

X=21

The two numbers are 21 & 18

8 0

4 years ago

Please help i'm really stuck on this! thank you :)

Fudgin [204]

The answer is b ,e if is a to answe wuestion

7 0

3 years ago

Y +

Usimov [2.4K]

Question:

What is the common denominator of $y+\frac{y-3}{3}$ in the complex fraction $\frac{y+\frac{y-3}{3}}{\frac{5}{y}+\frac{2}{3 y}}$

A) $3 y(y-3)$

B) $y(y-3)$

C) $3y$

D) $3$

Answer:

Option D : 3 is the common denominator

Explanation:

It is given that the complex fraction $\frac{y+\frac{y-3}{3}}{\frac{5}{y}+\frac{2}{3 y}}$

We need to determine the common denominator of $y+\frac{y-3}{3}$ from the complex fraction.

Let us consider the fraction $y+\frac{y-3}{3}$

To find the common denominator, let us take LCM.

Thus, rewriting the above fraction as,

$\frac{y}{1} +\frac{y-3}{3}$$

The LCM can be determined by multiplying the denominators.

Thus, we get,

$1\times3=3$

Thus, the common denominator is 3.

Hence, Option D is the correct answer.

6 0

3 years ago