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soldier1979 [14.2K]
3 years ago
7

Need help please!!!!

Mathematics
1 answer:
Orlov [11]3 years ago
5 0

Answer:

\frac{m + n}{m - n }  =   \frac{ - 8 + 4}{ - 8 - 4}

=-4/-12=1/3 is your answer

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a bacteria triples it’s original population in 25 hours (A=3A0). How big will it’s population be in 100 hours
Maru [420]

Answer:

81 times the original size

Step-by-step explanation:

AA0ktA=3A0=?=?=25hours=A0ekt

Substitute the values in the formula.

3A0=A0ek⋅25

Solve for k. Divide each side by A0.

3A0A0=e25k

Take the natural log of each side.

ln3=lne25k

Use the power property.

ln3=25klne

Simplify.

ln3=25k

Divide each side by 25.

ln325=k

Approximate the answer.

k≈0.044

We use this rate of growth to predict the number of bacteria there will be in 100 hours.

AA0ktA=3A0=?=ln325=100hours=A0ekt

Substitute in the values.

A=A0eln325⋅100

Evaluate.

A=81A0

At this rate of growth, we can expect the population to be 81 times as large as the original population.

7 0
3 years ago
The graph of a linear function passes through the point (-1, 2) and has a slope of 3. What is the equation of the function in sl
Harman [31]

Answer:

The equation of the function in slope-intercept form is y = 3 x + 5 .

Step-by-step explanation:

Given as :

A line passes through the point ( - 1 , 2 )

i.e ( x , y ) = ( - 1 , 2 )

The slope of the line is 3

The equation of line in slope intercept form

y - \textrm y_1 = m ( x - \textrm x_1 )

Where m is the slope of the line

So, y - 2 = 3 ( x - ( - 1 ) )

Or, y - 2 = 3 ( x + 1 )

Or, y - 2 = 3 x + 3

Or, y = 3 x + 3 + 2

∴   y = 3 x + 5

Hence The equation of the function in slope-intercept form is y = 3 x + 5 . Answer

8 0
3 years ago
I need help Asap please show me work
Kruka [31]

Answer:

392

Step-by-step explanation:

2((7 - 10)^2 + 5)^2

2((-3)^2 + 5)^2

2(9 + 5)^2

2(14)^2

2(196)

392

5 0
3 years ago
Read 2 more answers
Find the equation for the line that is parallel to the line with the equation y=-1/2x-11/2 passing through the point (0,-1)
Sever21 [200]
Y = -1/2x - 1
................
4 0
3 years ago
Write the English phrase as an algebraic expression. Then, simplify the expression. Let x represent the number,
weqwewe [10]

Answer:

3x - 2x

Step-by-step explanation:

The difference - the subtraction symbol

The product of three and a number - 3 multiplied by x (basically says what's the solution to three times x)

Two times the number - 2 times x

4 0
3 years ago
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