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siniylev [52]
3 years ago
12

What are the 4 different ways you can solve a quadratic equation.

Mathematics
1 answer:
mars1129 [50]3 years ago
5 0

Answer:

by \: using \: completing \: the \: square \: method \\ by \: using \: quadratic \: formula \:  \:  - b \:  plus \: or \: minus \frac{ \sqrt{ {b}^{2} - 4ac } }{2a}  \\ by \: factorizing \:  \\ this \: it \:  the \: only \: one \: i \: know \:

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Is 2.55 a irrational, rational, integer, whole number or natural number?
satela [25.4K]

So, the first thing we need to know is what is what.


So,  A natural number is a whole number

A whole number is an integer

and An integer is a rational number.


Now, since there is a terminating decimal (a decimal that does not go on forever) we know it is a rational number.


Since there is a decimal, it cannot be an integer, therefore

It is a rational number

4 0
3 years ago
A line passes through the point (10,-8) and has a slope of negative 3/2Write an equation in slope-intercept form for this line.
zhuklara [117]

Answer:

9383

Step-by-step explanation:

4 0
3 years ago
How do you find the area of a circle that has a radius of 4
Lisa [10]

Work is provided in the image attached.

Although you did not include units, I just used centimeters.

However, if there were no units, then just put your answer.

If you do not understand my work,

please ask me in the comments below.

8 0
3 years ago
Read 2 more answers
-2j < -14
Novay_Z [31]

Step-by-step explanation:

-2j < -14

Divide both sides by -2:

j > 7. (D)

7 0
3 years ago
Read 2 more answers
Help me, its trigonometry college
prohojiy [21]

4) (a) For these problems, you should take time to familiarize yourself with common fractions that appear on the unit circle.  \frac{\sqrt{3}} {3} does not appear in the unit circle unless you take the quotient 1/2 divided by sqrt(3)/2 which gives you 1/sqrt(3) which is the same as sqrt(3)/3.  So our numerator is 1/2 and our denominator is sqrt(3)/2.

And remember tangent is just sin/cos.  So what degree has sinx as 1/2 and and cosx as sqrt(3)/2?  Well, 30 degrees does, but 30 degrees is not within the range we are given.  That means they are looking for a sinx that gives us -1/2 and a cosx that gives us -sqrt(3)/2 and that is 210 degrees.

And 210 degrees in radians is 7pi/6.

I hoped that made sense.

(b) This is a lot easier. What angle gives us a cos x of -sqrt(3)/2?  According to the unit circle, 150 degrees and 210 degrees does.  They usually want these in radians, so the answer is 5pi/6 and 7pi/6, respectively.

5) What quadrant is radian measure 5 in?

Well 2pi or roughly 6.28 is a full circle. And 5 is slightly less than 6.28, so it is probably in quadrant IV.

But to be sure let's change 5 radian to degrees:

5 * 180/pi = 900/pi = 286.48 degrees

286.48 degrees is definitely in Q4, so we are correct.




7 0
3 years ago
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