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2 years ago

7,7.5,8,8.5,9 common difference

Mathematics

2 answers:

raketka [301]2 years ago

3 0

Answer:

$0.5$

Step-by-step explanation:

$9-8.5$

$=0.5$

zhannawk [14.2K]2 years ago

3 0

Answer:

Step-by-step explanation:

subtract 7 from 7.5 to get .5

to prove your answer subtract 8.5 from 9

subtract any from the left to the one to the immediate right to get .5

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Part a) Write the equation of the circle by completing the square.

Veronika [31]

X² +4x+y²-2y=20
x²+2*2x+4 +y²-2y+1 =20+4+1
(x+2)²+(y-1)²= 25
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center (-2,1)

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2 years ago

Which of the following is an appropriate measure of central tendency to apply

Serhud [2]

Answer:

Mean and Median

Step-by-step explanation:

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2 years ago

PLEASE HELP find the value of x

Elenna [48]

I think it could be 40° or 130°. Im not 100% sure however because i dont know how much all the numbers add up to. It could either be 180° or 270°

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2 years ago

Read 2 more answers

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.

6 0

2 years ago

Classify by degree and number of terms:

tester [92]

Answer:

cubic binomial is your answer

6 0

2 years ago