A population of bacteria doubles every 15 hours. Initially, the population of bacteria is 40. What is the population of the bacteria after 40 hours? Enter your answer, rounded to the nearest whole number, in the box.

Answers

Answer 1

Answer:

A number of bacteria after 30 hours is 480 bacteria.

The answer is 480 because originally the amount was 80. After 12 hours it doubled to 160. Then after 24 hours have passed, the amount doubled again. So now the amount is 320 bacteria. Then 6 hours passed (half of 12 hours) so then you add half of that amount (160) to 320. 320 plus 160 is 480. So the answer is 48

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What is the solution of the system? Use substitution.4x – y = 5
3x – 7 = 2
A) (3, 7)
B) (7, -7)
C) (-3, 7)
D) (3/4, 2/5

Answers

4x-y=5

3x-7=2

We need to solve 3x-7=2 for x

Let's start by adding 7 to both sides

3x-7+7=2+7

3x=9

Now just divide both sides by 3 so we can find the value for x

3x/3=9/3

x=3

Now substitute 3 for x in 4x-y=5

4x-y=5

(4)(3)-y=5

-y+12=5

Now add -12

-y=12-12=5-12

-y=-7

Divide both sides by -1 so we can eliminate the negative sign

-y/-1=-7/-1

y=3

The answer is A

(3,7)

I hope that's help:0

If 6x-4 is 11 less than 25 what is the value of 9x

Answers

The value of 9x will be equal to 27.

What is an expression?

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that 6x-4 is 11 less than 25.

=> 6x - 4 = 25 -11

Take all the constant terms on one side and solve.

=> 6x = 25 - 11 + 4

=> 6x = 18

Divide 18 by 6 to get the value of x.

=> x = 18/6

=> x = 3

The value of 9x will be calculated as below:-

9x = 9×3 = 27

Therefore, the value of 9x will be equal to 27.

To know more about expression follow

brainly.com/question/723406

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Given that 6x-4 is 11 less than 25

=> 6x - 4 = 25 -11

=> 6x = 25 - 11 + 4

=> 6x = 18

=> x = 18/6

=> x = 3

Now, we know x = 3

So 9x = 9×3 = 27

$\boxed{ \textbf{ \red{Answer: 9x = 27}}}$

Solve the equation. Use words 2(x+2)+58=8x-6(x-5)

Answers

Answer:

$2(x+2)+58=8x-6(x-5)\n\mathrm{or,\ }2x+4+58=8x-6x+30\n\mathrm{or,\ }2x+62=2x+30\n\mathrm{or,\ }62=30,\ \mathrm{which\ is\ not\ possible.}\n\mathrm{So\ the\ given\ equation\ has\ no\ solution.}$

Find the area, please

I’ll give brainlist

Answers

Answer:

Area = 104 m²

Step-by-step explanation:

the figure is composed of a rectangle and a triangle

area of rectangle = length × breadth = 10 × 8 = 80 m²

area of triangle = $(1)/(2)$ × base × perpendicular height

the base of the triangle is opposite the 8 m side of the rectangle and is 8 m

the perpendicular height of the triangle is 6m , then

area of triangle = $(1)/(2)$ × 8 × 6 = 4 × 6 = 24 m²

sum the areas of the two parts

area = 80 + 24 = 104 m²

Slope for -8,18 and -14,-3

Answers

$(\stackrel{x_1}{-8}~,~\stackrel{y_1}{18})\qquad (\stackrel{x_2}{-14}~,~\stackrel{y_2}{-3}) \n\n\n \stackrel{slope}{m}\implies \cfrac{\stackrel{\textit{\large rise}} {\stackrel{y_2}{-3}-\stackrel{y1}{18}}}{\underset{\textit{\large run}} {\underset{x_2}{-14}-\underset{x_1}{(-8)}}} \implies \cfrac{ -21 }{-14 +8} \implies \cfrac{ -21 }{ -6 } \implies \cfrac{7}{2}$

The temperature on Wednesday was 8° more than a third of Tuesday’s temperature. If T represents Tuesday’s temperature, write an expression for Wednesday’s temperature, W.

Answers

I love these problems -- you don't have to do math -- it's all just reading and using logic! So we're saying T represents Tuesday. 8 more than can be expressed as what? +8. A third can be expressed as what? 1/3. What are we splitting into thirds? T. Therefore, 1/3t+8 is your answer.

Answer:

what is it

Step-by-step explanation:

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