MATHEMATICS HIGH SCHOOL

Given the formula
an = 3 * 2^n-1
What is the 9th term?

Answers

Answer 1

Answer:

Answer:

a9=3×2^9-1

a9=3×2^8

a9=3×256

a9=768

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Help with math problem

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Where is you question? We can’t see anything... have a great day!

Plz factor
2x^2+17x-21

Answers

2x^2 + 17x -21 cannot be factored nicely, if it was +21 you could, but the zeros for this have to gotten using the quadratic equation

-b +/- (b^2-4ac)^1/2
2a
so

-17 +/- (17^2-4(2)(-21))^1/2
2(2)
-17 +/- (457)^1/2
4

so the zeros are roughly 1.094 and -9.594

on a farm, 4 1/2 out of every 15 acres of land are used to grow crops. Wheat is grown on 5/8 of the land used to grow crops. What percentage of the total area of the land on the farm is used to grow wheat?

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The answer is 18.75% (I THINK, I'm not very good at maths!) here's how I worked it out:

4.5 + 4 1/2 so for the first part it is a fraction 4.5/15 you then multiply this to 5/8 and get 225/120 which you can then simplify to 3/16 then you work out 3 divided by 16 and get 0.1875 and multiply this decimal by 100 to get the percentage, 18.75%.

Hope this helped, but check with other people (I'm not very good at maths)!

Which of the following statements are true? select all that apply

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Answer:

its A :)

Step-by-step explanation:

The correct answer in the photo is A. B C D are wring

Can anyone help me solve this problem?

Answers

its about finding the equation of a circle from its general form equation:
x^2 + y^2 + 8x - 4y - 61 = 0
x^2 + 8x + 16 + y^2 - 4y + 4 = 61 + 16 + 4
(x + 4)^2 + (y - 2)^2 = 81
therefore the center is C(-4, 2), and the radius is 9

A veterinarian is interested in the average number of pets her clients own. Over the course of a month, she questions each client she meets with and records their responses. The veterinarian calculates the average and draws a conclusion from her data.What kind of statistical study did the veterinarian conduct?

A.
theoretical study
B.
survey
C.
experiment
D.
observational study