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Anastaziya [24]
3 years ago
14

In the last year a total of 2783 earthquakes occurred in the country. Of these, 85.8% were minor tremors w/ magnitudes of 3.9 or

less on the richer scale. How many minor earthquakes occurred in the country last year? Round to nearest whole number.
Mathematics
1 answer:
Aleksandr-060686 [28]3 years ago
8 0
 First you have to make it into a equation then solve it and go from there.
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Which shows the correct substitution of the values a, b, and c from the equation –2 = –x + x2 – 4 into the quadratic formula?
ASHA 777 [7]

The <em><u>correct answer</u></em> is:

x=\frac{1\pm \sqrt{(-1)^2-4(1)(-2)}}{2(1)}

Explanation:

The Quadratic Formula is

x=\frac{-b\pm \sqrt{b^2-4ac}}{2a},

where a, b and c are the coefficients of a quadratic equation written in standard form, or 0=ax²+bx+c.

This means that first, we need to make our equation equal 0.

We have

-2 = -x + x² - 4

To make this equal 0, we must cancel the -2.  We do this by adding 2:

-2+2 = -x + x² - 4 + 2

0 = -x + x² - 2

Now we write this in standard form.  This means the x² term must come first, then the x term, then the constant:

0 = x²-x-2

This makes a = 1, b = -1 and c = -2.  We then plug this into the quadratic formula.

8 0
3 years ago
Read 2 more answers
PLZ HELP ME DUE RIGHT NOW
horsena [70]

Answer:

Ask a dang tutor mane and the tutor will give you all the answers

7 0
3 years ago
Is second term of a geometric series is 48 and it's fifth term is 6 then find the sum of the first 6 terms.​
AlekseyPX

Answer:

the sum of the first 6 terms =189

Step-by-step explanation:

the first 6 terms-

96,48,24,12,6,3

I found them easily by dividing 48 with random small numbers until I got 6 for the fifth term. So here I divided 48 by 2 which is = 24(3rd term), then divided 24 by 2 which is =12(4th term) and then again decide the answer by 2 and finally got 6 for the 5th term. So the ratio is 1/2. For the first term I did the opposite, multiply 48 by 2 which is = 96. And lastly find the sixth term and add them up which is = 189

I tried my best to explain it in simple terms, hope this helps:)

5 0
3 years ago
You have read 100 pages of a 250 page book. You have 3 days left to finish the book. How many pages will you need to read each d
pogonyaev
You have to read 50 pages each day to finish the book.

8 0
4 years ago
Read 2 more answers
Solve <img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B3%7D%20%20%3D%20%20%5Cfrac%7Bh%7D%7Bh%20-%203000%7D%20" id="TexFormula1" ti
dezoksy [38]
<span>\sqrt{3}(h-3000)=h
</span>(\sqrt{3}h-\sqrt{3}(3000)=h
(\sqrt{3}-1)h=\sqrt{3}(3000)
h=\frac{\sqrt{3}(3000)}{(\sqrt{3}-1)}
=\frac{\sqrt{3}(3000)}{(\sqrt{3}-1)}
=7098.076 (approximately)
8 0
3 years ago
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