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Oksana_A [137]
2 years ago
15

-

Mathematics
1 answer:
dangina [55]2 years ago
3 0

Answer:

(x-3)^2  =21

Step-by-step explanation:

~~~~~~~x^2-6x-12=0\\\\\implies x^2 -6x +9-21=0 \\\\\implies x^2 -2\cdot x \cdot  3 +3^2=21\\\\\implies (x-3)^2  =21

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-2/9x+(-7/9y)+(-7/10x+(-2/3)
coldgirl [10]

Step-by-step explanation:

=-32-9 08 3X-97y

9- 2⋅ x+9- 7⋅ y+(1 0- 7⋅ x+3- 2)

5 0
2 years ago
X+2y-z = 9<br> -2x+y+z= 1<br> 2x-y+2z= -5
hodyreva [135]

Answer:

I don't understand the first one

7 0
2 years ago
Plz help with math thank you
Delicious77 [7]

Answer:

Step-by-step explanation:

Law of Sines  recall   Sin(A) /a  = Sin(B) /b  

does the above make sense?

Next we need to find  the angle of A

notice that 16+75=91  :o

so angle A is only 89° ..(b/c all the way around then inside of a triangle is 180)  so this is NOT a right triangle but that's okay, b/c law of sines still works fine.

then we want to find length of line AB

and if 89 = A  then a = BC

and if  75 = B the  b = AB (note that in the given triangle this is angle C, i'm using B , b/c you can see the difference between capital B and  lower case b much easier than you can with C, & c  :/   )

capitals are the angles while lower case are the length of the sides

then

Sin(89) / 29 = Sin(75) / b

solve the parts that can be put into numbers or solve for 'b' first, that means isolate 'b' all by itself on one side of the equal sign .

0.034477 = 0.965925/ b

b = 0.965925 / 0.034477

b = 28.0165

b = 28.0 ( to the nearest 10th)

we have the parts to plug in now

Sin(75) /

8 0
3 years ago
What is x in this equation 2-3/4x=11
vladimir2022 [97]

Answer:

x=-12

Step-by-step explanation:

2-3/4x=11

3/4x=2-11

3/4x=-9

x=-9/(3/4)

x=(-9/1)(4/3)

x=-36/3

x=-12

3 0
3 years ago
A car uses 1 liter of gas every 12 kilometers. How many meters can the car travel on 3 liters of gas? 36 meters 3,600 meters 360
leonid [27]
36,000 meters i believe
3 0
3 years ago
Read 2 more answers
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