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3 years ago

2x – 3 = 6 if x=3 please help me im desperate

Mathematics

2 answers:

inysia [295]3 years ago

6 0

The answer is false. It would be 3.

marissa [1.9K]3 years ago

5 0

2x-3=6
2(3)-3=6
multiply the parenthesis
6-3=6
I hope this helped (:

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If 3x+54+(65 × 32)+ 902- (43/12) =y, then what is y?

IceJOKER [234]

Answer:

We cannot solve without a value for x. The simplified form is $3x+\frac{36,389}{12} =y$

Step-by-step explanation:

If the equation is $3x+54+(65)(32)+902-\frac{43}{12}=y$ then we cannot solve it until we know the value of x. We can simplify it using order of operations such as PEMDAS.

$3x+54+(65)(32)+902-\frac{43}{12}=y \\3x+54+2,080+902-\frac{43}{12}=y \\3x+3,036-\frac{43}{12}=y \\3x+\frac{36,432}{12} -\frac{43}{12} =y\\3x+\frac{36,389}{12} =y$

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2 years ago

What are the solutions to the quadratic equation below x^2+20x+100=7

aleksandrvk [35]

First you must have the quadratic equal to zero. In order to do this you must subtract 7 to both sides

x^2 + 20x + (100 - 7) = 7 - 7

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Now you must find two numbers who's sum equals 20 and their multiplication equal 93

Are there any? NO!

This means that you have to use the formula:

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In this case:

a = 1

b = 20

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$\frac{-(20) plus/minus\sqrt{20^{2} - 4(1)(93)} }{2*1}$

$\frac{-20 plus/minus\sqrt{400 - 372} }{2}$

$\frac{-20 plus/minus\sqrt{28} }{2}$

^^^We must simplify √28

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so...

$\frac{-20 plus/minus 2\sqrt{7} }{2}$

simplify further:

$-10 plus/minus\sqrt{7$

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-10 - √7

***plus/minus = ±

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2 years ago

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Answer:

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Therefore, we have that the total area of the four walls is

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The area of the door is: 3 x 7 =21 square feet

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Thus, the total amount of area that won't be painted is

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So we are going to take the total area minus the area that won't be painted to know the total area that Faron will pain:

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3 years ago

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Answer:

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B) Subtraction operation will be used

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