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Law Incorporation [45]
3 years ago
11

Find the solutions of the quadratic equation -9x2 +2 +3 = 0.

Mathematics
1 answer:
Verdich [7]3 years ago
3 0

Answer:

Step-by-step explanation:

Assuming you mean -9x^2 +2x+3=0

by the quadratic formula:

-2 +-\sqrt{4+108}/18

Therefore we end up with: +-\sqrt{5]/3

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Okay so you take the number of weekdays to the number of weekends the ratio is 5:2 one month, which usually has 30 days which is 4 weeks tops so that is about 21 week days and and 9 weekends then times both by 12 you get 108 weekends and 252 weekdays i know that only equals 360 but this is a rough estimate so write that as a fraction 3/7 so there is a third that it will be on a weekday 
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3 years ago
- (x + 2)2 + (y - 9)2 = 1
telo118 [61]

Answer:

x+y=-5.75

Step-by-step explanation:

Ⓗⓘ ⓣⓗⓔⓡⓔ

Well, you would simply need to use the distributive property!

-(2)x-(2)2+(2)y-(2)9=1

-2x-4+2y-18=1

Then you need to add/subtract so the similar numbers are together.

-2x+2y-22=1

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x+y=-5.75

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Step-by-step explanation:

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Please EXPLAIN how to get this answer so I can do it with other problems. A straight answer would be great, but I have to do abo
OLEGan [10]

Answer:

PQ = 3.58, and RQ = 10.4

Step-by-step explanation:

We are given the hypotenuse of the triangle, and an angle. Use sin and cos to solve.  

Hypotenuse = 11,

Opposite side is PQ

Adjacent side is RQ

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Sin x  = (opposite side)/(hypotenuse)

Cos x = (adjacent side)/(hypotenuse)

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Sin 19 = x/11

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For RQ, this is the side adjacent to the angle, so use cos,

Cos 19 = x/11

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