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3 years ago

Sooooooooo, I need Help PLEASE!!!!!!

Mathematics

1 answer:

dem82 [27]3 years ago

6 0

Answer: Sorry, can you repost and comment on this post to reach out to me with a clear pic bc the light is blocking the center of the page

Step-by-step explanation:

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Simplify the expression: 10z+5z+2z

Rufina [12.5K]

The simplified expression is 17z

7 0

3 years ago

Will someone help with this ! I was allowed a retry for it and I don’t know how to do it

pashok25 [27]

Answer:

$\frac{dN}{dt}=k(725-N)\\separating the variables and integrating\\\int \frac{dN}{725-N}=\int kdt+c\\-log (725-N)=kt+c\\log (725-N)=-kt-c\\(725-N)=e^{-kt-c} =e^{-kt} *e^{-c} =Ce^{-kt} \\when t=0,N=400\\725-400=Ce^{0} =C\\C=325\\when t=3,N=650\\725-650=325e^{-3k} \\\frac{75}{325}=(e^{-k})^3\\\\e^{-k} =(\frac{3}{13}) ^{\frac{1}{3} } \\when t=5\\725-N=325(\frac{3}{13}) ^{\frac{5}{3} } =325*\frac{3}{13}*(\frac{3}{13} )^{\frac{2}{3}}\\N=725-75*(\frac{3}{13} )^{\frac{2}{3} }=725-28=697$

Step-by-step explanation:

6 0

3 years ago

Which expression can be used to find the surface area of the following square pyramid?

kodGreya [7K]

Answer:

Step-by-step explanation:

expression for surface area = a² + a √(a²/4+h²)

=4² + 2(4) √(4²/4+5²)

=16 + 8 √(16/29)

= 24 √0.55

= 20.65

6 0

3 years ago

What is the least common denominator of the rational expressions below? 1/x^2 - 4/3x^2+15x

vladimir1956 [14]

Answer:

The LCD is 3x²

The other two denominators can be factors of 3x²

Step-by-step explanation:

To get the equivalent fractions, divide the original denominator into the LCD, then multiply the original numerator by the quotient.

For the first term: 1/x²

3x² ÷ x² = 3 3×1=3 The equivalent is 3/3x²

Second term: Leave it as it is.

For the third term: 15x

The implied denominator is 1

3x² ÷ 1 = 3x² 3x² × 15 = 135x²

The equivalent is 135x²/3x²

To check the validity, substitute a value for x and calculate the numbers.

For example let x = 3

The original expression becomes

1/3² + 4/3(3²) - 15(3)

1/9 + 4/27 - 45

With the LCD it is

3/27 + 4/27 - 1215/27

5 0

3 years ago

Read 2 more answers

A little while ago, a dolphin was swimming below sea level at -7 meters. Now the dolphin is jumping at 0.5 meters. What does thi

zimovet [89]

This means that the dolphin ascended 7.5 meters in total.

The sea level is 0.

We know that to start off with, the dolphin was seven meters under the sea level.

We also know that the dolphin jumped .5 meters above the sea level.

This is a matter of absolute value; we are looking to find total distance, not actual height (which we already know, .5). Therefore, we ignore the negative sign and instead regard how many places each measurement is away from zero, which is another way of saying absolute value.

Take a look at x.

| x |

The lines surronding x represent absolute value. With that in mind, I can show you the process:

| -7 | + | .5 | = 7.5

is the same as saying 7 + .5 = 7.5

Let me know if you have any questions, or if this helped you!

8 0

4 years ago

Sooooooooo, I need Help PLEASE!!!!!!​

Sooooooooo, I need Help PLEASE!!!!!!