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3 years ago

12

If using the method of completing the square to solve the quadratic equation x^2+15x+21=0, which number would have to be added t

o "complete the square"?

2 answers:

Anit [1.1K]3 years ago

8 0

Step-by-step explanation:

the answer is in the above image

Anna35 [415]3 years ago

3 0

Answer:

my answer is 225/5 sorry comments for wrong

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What is the product of 36 and 80

alexdok [17]

The product of 36 and 80 is 2880

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The base of a solid in the region bounded by the two parabolas y2 = 8x and x2 = 8y. Cross sections of the solid perpendicular to

Usimov [2.4K]

The two curves intersect at two points, (0, 0) and (8, 8):

$x^2=8y\implies y=\dfrac{x^2}8$

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$\implies x=0,x=8\implies y=0,y=8$

The area of a semicircle with diameter $d$ is $\dfrac{\pi d^2}8$ . The diameter of each cross-section is determined by the vertical distance between the two curves for any given value of $x$ between 0 and 8. Over this interval, $y^2=8x\implies y=\sqrt{8x}$ and $\sqrt{8x}>\dfrac{x^2}8$ , so the volume of this solid is given by the integral

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3 years ago

The monthly membership costs include a $10 basic fee plus $2 for each DVD she rents. Which equation describes v, the number of D

liubo4ka [24]

Answer:

A) v = T/2 - 5

Step-by-step explanation:

T = 10+2v

2v = T-10

v = (T-10)/2 = T/2-5

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3 years ago

Emergency help please thank you

AlladinOne [14]

I would say the third asnwer, so 90 degrees :)

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3 years ago

What is the length of a rectangle with width 10 inches and area 45 inches^2? Use 3.14

gogolik [260]

Why would we need 3.14 as pi? The answer is 45/10 = 4.5 inches.

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3 years ago