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3 years ago

9

Simplify sqrt(x^2-16)

1 answer:

Softa [21]3 years ago

4 0

Remember for this type of question.I'm guessing you make the equation equal to 0. Then square both sides the (X ^2-16) and 0. Then the square root goes away. Then you factor it according to the difference of squares method. By taking the square root of x^2 and 16. So ultimately it turns into 2 binomials according to the difference of squares method. The simplified answer would be (X-4)(X+4)=0. To solve for x in each case, take each respective equation separately and make it equal to 0. Solve for x.

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3 years ago

Read 2 more answers

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borishaifa [10]

The rent for one movie is $4.50 and rent for one video game is $5.50

Step-by-step explanation:

Let,

Rent for one movie = x

Rent for one video game = y

According to given statement;

12x+2y=65 Eqn 1

3x+5y=41 Eqn 2

Multiplying Eqn 2 by 4

$4(3x+5y=41)\\12x+20y=164\ \ \ \ Eqn\ 3$

Subtracting Eqn 1 from Eqn 3

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Dividing both sides by 18

$\frac{18y}{18}=\frac{99}{18}\\y=5.50$

Putting y=5.50 in Eqn 2

$3x+5(5.50)=41\\3x+27.50=41\\3x=41-27.50\\3x=13.50$

Dividing both sides by 3

$\frac{3x}{3}=\frac{13.50}{3}\\x=4.50$

The rent for one movie is $4.50 and rent for one video game is $5.50

Keywords: linear equation, elimination method

Learn more about linear equations at:

#LearnwithBrainly

7 0

3 years ago

Please help i’m doing trying to do my gf work please i’ll give you brainliest

otez555 [7]

Answer:

t = 5 seconds h = 128 feet

Step-by-step explanation:

The given equation of the object is :

$h(t)=-16t^2+64t+80$ .....1

When it hits the ground,

h(t) = 0

So,

$-16t^2+64t+80=0\\\\t=-1\ s\ and\ t=5\ s$

The object will hit the ground in 5 seconds.

Now, put t = 1 s in equation (1).

$h(1)=-16(1)^2+64(1)+80\\\\h(t)=128\ ft$

The object is at a height of 128 ft at 1 second.

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Nine more than hte product of the number and 6 equel 8

maria [59]

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