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3 years ago

5) Twelve divided by a number. 6) x +10 7) 3x-5 8) 6x + 2

Mathematics

1 answer:

Maru [420]3 years ago

7 0

Answer:

5)12/x

6) a number increased by 10

7) three times a number decreased by 5

8) 6 times a number increased by 2

Step-by-step explanation: "a number" refers to a variable.

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Researchers recorded that a certain bacteria population declined from 800,000 to 500,000 in 6 hours after the administration of

kupik [55]

Answer:

We can assume that the decline in the population is an exponential decay.

An exponential decay can be written as:

P(t) = A*b^t

Where A is the initial population, b is the base and t is the variable, in this case, number of hours.

We know that: A = 800,000.

P(t) = 800,000*b^t

And we know that after 6 hours, the popuation was 500,000:

p(6h) = 500,000 = 800,000*b^6

then we have that:

b^6 = 500,000/800,000 = 5/8

b = (5/8)^(1/6) = 0.925

Then our equation is:

P(t) = 800,000*0.925^t

Now, the population after 24 hours will be:

P(24) = 800,000*0.925^24 = 123,166

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2 years ago

A nutrional label states that there are 36 grams of carbs in each serving. This accounts for 12% of a daily value. how many gram

Nina [5.8K]

Answer:

300 gm

Hope I helped :)

Step-by-step explanation:

3 0

3 years ago

A collection of nickels and quarters is worth 2.85 . There are 3 more nickels than quarters how many nickels and quarters are th

Zolol [24]

A nickel is equal to 5 cents or 0.05 dollars.

A quarter is equal to 25 cents or 0.25 dollars.

Let number of nickels be = n

Let number of quarters be = q

$0.05n+0.25q=2.85$ ...........(1)

As it is given, there are 3 more nickels than quarters so equation becomes,

$n=q+3$ ................(2)

Plug in the value of 'n' from (2) in (1)

$0.05(q+3)+0.25q=2.85$

= $0.05q+0.15+0.25q=2.85$

$0.30q=2.70$

$q=9$

As $n=q+3$ we get, $n=9+3=12$

Hence, there are 12 nickels and 9 quarters.

3 0

3 years ago

Fastest answer gets brainiest !

saveliy_v [14]

Answer:

A. 1/16

Step-by-step explanation:

<u>The most repeated value is:</u>

(1/4)/4 = 1/16

There are 4 of them.

Correct choice is A

3 0

3 years ago

Is y= x + 2 and y= -x + 3 perpendicular lines?

Vlad [161]

I believe y=x+2 and y=-x+3 are perpendicular lines.

8 0

3 years ago

Read 2 more answers