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2 years ago

A freight train is traveling at an average rate of 45 miles per hour. Which equation represents the situation?

Mathematics

2 answers:

ollegr [7]2 years ago

6 0

Hi there!

The answer would be A. m = 45h

Hope this helps

Finger [1]2 years ago

3 0

Answer:

m=45h

Step-by-step explanation:

The independent variable here is h, the number of hours it traveled, and this determines m.

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Scientists have discovered a vaccine for a debilitating disease. This year there were 570,000 reported new cases of the disease

Ket [755]

Answer: There are approximately 853827 new cases in 6 years.

Step-by-step explanation:

Since we have given that

Initial population = 570000

Rate at which population decreases is given by

$\frac{2}{3}$

Now,

First year =570000

Second year is given by

$570000\times (\frac{1}{3})$

Third year is given by

$570000(\frac{1}{3})^2$

so, there is common ratio ,

it becomes geometric progression, as there is exponential decline.

so,

$570000,570000\times \frac{1}{3},570000\times( \frac{1}{3})^2,......,570000\times (\frac{1}{3})^6$

a=570000

common ratio is given by

$r=\frac{a_2}{a_1}=\frac{1}{3}$

number of terms = 6

Sum of terms will be given by

$S_n=\frac{a(1-r^n)}{(1-r)}$

We'll put this value in this formula,

$S_6=\frac{570000(1-(\frac{1}{3})^6}{(1-\frac{1}{3})}\\\\=853827.16$

So, there are approximately 853827 new cases in 6 years.

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2 years ago

Pls I need help !!!!!!

Marianna [84]

Answer: m1 m2 and m5 all equal to 135 as well

While m3 m6 and m4 are 45

Why: since they are on a line the two angles together should equal 180. So 180- 135= 45

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2 years ago

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Scilla [17]

(x+3)(x-3)=
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