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Dahasolnce [82]
3 years ago
13

2(3x+2)=2x-1+x solve

Mathematics
1 answer:
alina1380 [7]3 years ago
7 0
First multiply and dstribute
a(b+c)=ab+ac
2(3x+2)=6x+4
6x+4=2x-1+x
add like terms
6x+4=3x-1
subtract 3x from both sides
3x+4=-1
subtract 4 from both sides
3x=-5
divide bothe sides by 3
x=-5/3
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Helpp degrees, minutes, and seconds​
svetlana [45]

Answer:

  3) 174°15'18"

  4) 34.859722...(repeating)°

  5) 434°, -286°

Step-by-step explanation:

There are 60 minutes in a degree, and 60 seconds in a minute.

3) To find minutes, multiply fractional degrees by 60:

  .255° = 0.255°×(60'/1°) = 15.3'

To find seconds, multiply fractional minutes by 60:

  0.3' = 0.3'×(60"/1') = 18"

Then the whole angle is ...

  174.255° = 174° 15' 18"

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4) The conversion works the other way, too.

  34° 51' 35" = 34° +51(1/60)° +35(1/3600)° = (34 619/720)°

  = 34.8597222...° (a repeating decimal)

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5) Add or subtract multiples of 360° to get co-terminal angles.

  74° +360° = 434°

  74° -360° = -286°

8 0
3 years ago
Is 16x^2-56x+49 a perfect square trinomial? How do you know ? If it is, factor the expression. Please show your work
daser333 [38]

Answer:

  • yes
  • (4x -7)^2

Step-by-step explanation:

If it is, the first and last terms are perfect squares, and the middle term is twice the product of the roots of those squares.

  16x^ = (4x)^2 . . . . a perfect square

  49 = 7^2 . . . . . . . a perfect square

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  16x^2 -56x +49 = (4x -7)^2

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The sign in the binomial factors is the same as the sign of the middle term of the trinomial.

6 0
3 years ago
The perimeter of a rectangle is 15x + 17y
patriot [66]

Answer:

c

Step-by-step explanation:

5 0
3 years ago
Find the sum of 2x2 3x - 4, 8 - 3x, and -5x2 2. -3x2 - 2 -7x2 - 2 -3x2 6 -7x2 - 6x - 2
Law Incorporation [45]
-3x to the second power - 2

I believe this is your answer. 
4 0
3 years ago
Can someone help me please
Crazy boy [7]

Answer:

It's 2/15

Step-by-step explanation:

5 0
3 years ago
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