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2 years ago

12

3x+15=18 we need to find x so what is x

1 answer:

Crank2 years ago

3 0

1. Put numbers that are on the same group.
3x = 18-15
(3 has x so it is separated from whole numbers 15 and 18)
(15 became negative because you moved it to the other side of the equals sign)

2. Simplify
3x = 18-15
3x = 3

3. Find x
Transfer 3 on 3x to the right side denominator (bottom)
That will make:
x = 3/3

4. Solve
3 divided by 3 is 1

ANSWER: x=1

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Which of the following constants can be added to x2 - 3x to form a perfect square trinomail?

serious [3.7K]

The constant that can be added to $x^2$ - 3x to form a perfect square trinomial is $2\frac{1}{4}$

The given expression is

$x^2$ - 3x

To form a perfect square trinomial

$(a-b)^2 =a^2-2ab+b^2$

The given expression is

$x^2$ - 3x

first we have to add a constant term with it

$x^2$ - 3x + z

By comparing the given expression and the perfect square trinomial

$a^2 =x^2$

a = x

Similarly

-2ab = 3x

where know a =x

Then,

-2b = 3

b = -3/2

Similarly

$b^2 = z$

$(\frac{-3}{2})^2$ = z

9/4 = z

Convert the simple fraction to mixed fraction

9/4 = $2\frac{1}{4}$

Hence, the constant that can be added to $x^2$ - 3x to form a perfect square trinomial is $2\frac{1}{4}$

The complete question is :

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?

$1\frac{1}{2},2\frac{1}{4}$ and $4\frac{1}{2}$

Learn more about perfect square trinomial here

brainly.com/question/16615974

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10 months ago

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goldenfox [79]

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2 years ago

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Ben is 5 years less than 3 times Gracie's age. How can that be represented as an expression?<br>

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3 years ago

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3 years ago

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Advocard [28]

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3 years ago