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bulgar [2K]
3 years ago
15

If cos x = -√3/2

Mathematics
1 answer:
Luda [366]3 years ago
7 0

Answer:

c

Step-by-step explanation:

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Why do you flip the equation when solving something like 10>-9x+10?
Karolina [17]
You flip the sign from > to < only when you are dividing by a negative number and in this case it would be negative 9. 
7 0
3 years ago
Given the Quadratic, determine the value of the discriminant.<br> 2x2 – 3x – 20 = 0
Andrews [41]
2x2-3x-20=0
4-3x-20=0
2-20=-16
-3x-16=0
-3x=16
x= -5.33333
I think i did it right. i hope this helps.
4 0
3 years ago
Evaluate each geometric series described<br> 1-4+16-64...., n=6
xz_007 [3.2K]

Answer:

- 819

Step-by-step explanation:

The sum to n terms of a geometric series is

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

where a is the first term and r the common ratio

Here a = 1 and r = - 4 ÷ 1 = - 4, thus

S_{6} = \frac{1((-4)^6-1)}{-4-1} = \frac{4096-1}{-5} = \frac{4095}{-5} = - 819

5 0
3 years ago
Read 2 more answers
Is adding polynomials will always yield a polynomial answer true or false ?
zhuklara [117]
True: adding two polynomials will always result in another polynomial
3 0
2 years ago
HELP 1/7z+2=-6/7z what’s the solution set please send help I’m suffocating under homework
Snezhnost [94]

Isolate the z. Note the equal sign. Subtract 1/7z to both sides

1/7z (-1/7z) + 2 = -6/7z (-1/7z)

2 = -6/7z - 1/7z

Simplify. Combine like terms

2 = -7/7z

2 = -1z

Isolate the z. Divide -1 from both sides

(2)/-1 = (-1z)/-1

z = 2/-1

z = -2

-2 is your answer

hope this helps

8 0
3 years ago
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