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2 years ago

9

6d2+8d-5=0

Formula1" title="6d {}^{2} + 8d - 5 = 0 \\ " alt="6d {}^{2} + 8d - 5 = 0 \\ " align="absmiddle" class="latex-formula">

1 answer:

FromTheMoon [43]2 years ago

5 0

The answer is d= 1/4
hope this helps

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Select the statment that correctly describes the solution to this system of equations.

Alexxandr [17]

A there is infinite solutions since if you multiply 2 to the bottom equation at will equal the top equation

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1 year ago

9y=-3x+5 how do I find the slope for this?

LekaFEV [45]

Answer:

The slope is -1/3 and the y intercept is 5/9

Step-by-step explanation:

To find the slope, we need to put the equation in the form y= mx+b

9y=-3x+5

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2 years ago

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Statuary Hall is an elliptical room in the United States Capitol in Washington, D.C. The room is also called the Whispering Gall

dalvyx [7]

Answer: a) $\frac{x^{2} }{2352.25 }$ + $\frac{y^{2} }{529}$ = 1

b) The distance of two foci is 85.4 feet

c) Area = 3502.67 square feet

Step-by-step explanation: a) An ellipse has the equation in the form of:

$\frac{x^{2} }{a^{2} }$ + $\frac{y^{2} }{b^{2} }$ = 1, where a is the horizontal axis and b is the vertical axis.

For the Statuary Hall, a = $\frac{97}{2}$ = 48.5 and b = $\frac{46}{2}$ = 23, so the equation will be

$\frac{x^{2} }{2352.25 }$ + $\frac{y^{2} }{529}$ = 1.

b) To determine the distance of the foci, we have to calculate 2c, where c is the distance between one focus and the center of the ellipse. To find c, as a, b and c create a triangle with a as hypotenuse:

$a^{2}$ = $b^{2} + c^{2}$

$c^{2} = a^{2} - b^{2}$

c = $\sqrt{48.5^{2} - 23^{2} }$

c = 42.7

The distance is 2c, so 2·42.7 = 85.4 feet.

The two foci are 85.4 feet apart.

c)The area of an ellipse is given by:

A = a.b.π

A = 48.5 · 23 · 3.14

A = 3502.67 ft²

The area of the floor room is 3502.67ft².

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2 years ago

What is 7 1/3 + 5 4/5

Alecsey [184]

Answer:

1.5333333

Step-by-step explanation:

7 1/3 + 5 4/5 = 23/15 =1 8/15 =1.53

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2 years ago