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4 years ago

Solve x2 = 12x – 15 by completing the square. Which is the solution set of the equation?

Mathematics

2 answers:

REY [17]4 years ago

8 0

X ·2 = 12x - 15

2x = 12x - 15

2x + (-12x) = (12x - 15) + (-12x)

Result: x = 3/2

serious [3.7K]4 years ago

5 0

The answer to your solution of the equation is 3/2

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It is 98.4252 I believe.

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3 years ago

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What is 2(x+5)=x+4 im bad at math

swat32

Answer:

x= -6

Step-by-step explanation:

2(x+5)=x+4 (given)

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x+10=4 (simplify)

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A stadium has seating accommodation for 3800 people. At a cricket match all seats were taken. If there were 5609 people attendin

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Answer:

Step-by-step explanation:

Those standing is the same thing as people who didn't have seats.

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3 years ago

Use a definition, postulate, or theorem to find the value of x in the figure described.

Rudiy27

we know that

An <u>angle bisector</u> is a line or ray that divides an angle into two congruent angles

in this problem

m∠RST=m∠RSV+m∠VST

m∠RSV=m∠VST

hence

m∠RST=2*m∠RSV --------> equation 1

we have

m∠RST=(6x-24)

m∠RSV=(2x+8)

Substitute in the equation 1

6x-24=2*(2x+8)

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6x-4x=16+24

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x=40/2

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3 years ago

The length and width of a rectangular room are measured to be 3.955±0.005m. Calculate the area of the room and its uncertainty i

Margarita [4]

Answer:

The area of the room and its uncertainty in square meters is:

15.642±0.040 $m^2$

Step-by-step explanation:

We know the area of a rectangular room is the multiplication of the length and width:

$Area= 3.955m*3.955m\\Area= 15.642 m^2$

Now we need to know the uncertainty, the uncertainty of a multiplication is:

$\frac{δ_a}{|Area|} =\frac{δ_L}{|L|}+\frac{δ_W}{|W|}$ (1)

$δ_A$ : Area uncertainty

$δ_L$ : Length uncertainty

$δ_W$ : Width uncertainty

A: Area of the room

L: Length

W: Width

Clearing the uncertainty of the area:

$δ_A=(\frac{δ_x}{|x|}+\frac{δ_y}{|y|})*Area$ (2)

$δ_A=(\frac{0.005}{|3.955|}+\frac{0.005}{|3.955|})*15.642 m^2$

$δ_A= 0.040 m^2$

The area of the room and its uncertainty in square meters is:

15.642±0.040 $m^2$

6 0

3 years ago