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3 years ago

14

Solve the equation for x. 2x2 − 72 = 0 Enter you solution in set notation.

1 answer:

CaHeK987 [17]3 years ago

4 0

Answer:

The set of solution is {-6,6}

Step-by-step explanation:

That means 2x^2-72=0?

If yes, here the solution for this:

x^2-36=0 (divise both sides by 2)

x^2=36

x^2=6^2

We have x=6 or x= - 6

The set of solution is {-6,6}.

Hope that useful for you.

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17 = a - 3 - За<br> Answer pleassse

Shkiper50 [21]

Answer:

-10 = a

Step-by-step explanation:

17 = a - 3 - За

Combine like terms

17 = -3 -2a

Add 3 to each side

17+3 = -3-2a+3

20 = -2a

Divide by -2

20/-2 = -2a/-2

-10 = a

4 0

3 years ago

Read 2 more answers

Eliminate the parameter t. Then use the rectangular equation to sketch the plane curve represented by the given parametric equat

____ [38]

Answer:

$9x^2+4y^2=36$

Step-by-step explanation:

We are given that

$x=2cos t$

$y=3 sin t$

$0\leq t\leq 2\pi$

$cost=\frac{x}{2}$

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$1=\frac{x^2}{4}+\frac{y^2}{9}$

By using the formula

$sin^2\theta+cos^2\theta=1$

$1=\frac{9x^2+4y^2}{36}$

$9x^2+4y^2=36$

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3 years ago

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Artyom0805 [142]

Answer:

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Step-by-step explanation:

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3 years ago

The rhombus QRST is made of two congruent isosceles triangles. Given m∠QTS = 64, what is the measure of ∠Q?

Lubov Fominskaja [6]

Answer:

The measure of Q is 116

Step-by-step explanation:

For a Rhombus, opposite angles are equal

so angle R is 64 too

Now, we should understand that the diagonals bisect the angles

So the angles in the triangle QTR are

Q + 32 + 32 = 180

Q = 180-64

Q = 116 degrees

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3 years ago

The sum of three consecutive integers is 81. What is the largest integer? A. 28 B. 27 C. 26 D. 25

ra1l [238]

x + x+1 + x+2 =81

Simplify:

3x + 3 = 81

Subtract 3 from both sides

3x = 78

Divide both sides by 3

x = 26 or C). 26

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3 years ago