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2 years ago

Is x=3 a solution for the equation: 3x + 7 = 13 Why or why not ?

Mathematics

1 answer:

expeople1 [14]2 years ago

5 0

Answer:

No.

Step-by-step explanation:

There are two different ways to do this - solve for x in the given equation or substitute the value for x and see if you get a true statement.

3x + 7 = 13 subtract 7 from both sides

3x = 6 divide by 3 on both sides

x = 2

3(3) + 7 = 13

9 + 7 = 13

16 ≠ 13

Therefore, x = 3 is not a solution for 3x + 7 = 13.

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Answer:

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3) - 15b+10 +10b= -5b + 10

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3 years ago

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is picking out some movies to rent, and he has narrowed down his selections to 5 documentaries, 7 comedies, 4 mysteries, and 5 h

pogonyaev

Answer: 91

Step-by-step explanation:

Given : The number of documentaries = 5

The number of comedies = 7

The number of mysteries = 4

The number of horror films =5

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Now, the number of possible combinations of 9 movies can he rent if he wants all 7 comedies is given by :-

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3 years ago

Given that f(x)=x^2+3x-28f(x)=x

spayn [35]

9514 1404 393

Answer:

x^2 +4x -21

Step-by-step explanation:

Substitute the given expressions and simplify.

f(x) + g(x)

= (x^2 +3x -28) +(x +7)

= x^2 +(3+1)x +(-28 +7)

= x^2 +4x -21

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3 years ago

In a day, Robin spends 6 hours at school, sleeps for 9 hours, plays for 3 hours, and spends the rest of the time doing other thi

slavikrds [6]

6hrs = school
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other things = 25% -- 6/24 6/24*100

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3 years ago

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Fed [463]

Answer:

the slope is 0.

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2 years ago

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