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2 years ago

I only need help on number 8 please

Mathematics

2 answers:

Hoochie [10]2 years ago

4 0

Answer:

we can't see the question

Step-by-step explanation:

Setler [38]2 years ago

3 0

Answer:

A y =

x − 6

Step-by-step explanation:

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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):

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

$y^2=\dfrac{x^4}{64}=8x\implies\dfrac{x^4}{64}-8x=0\implies\dfrac{x(x-8)(x^2+8x+64)}{64}=0$

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

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

$\displaystyle\frac\pi8\int_0^8\left(\sqrt{8x}-\dfrac{x^2}8\right)^2\,\mathrm dx=\frac{288\pi}{35}$

6 0

3 years ago

Please help<br> Please help find Y

max2010maxim [7]

Answer:

Step-by-step explanation:

The given angle is 45 degrees so the triangle has the same legs.

we can find the hypotenuse by using the Pythagorean theorem

y= √2(√2)^2 = √4 = 2

8 0

3 years ago

Eighty percent of the dogs have completed obedience classes. How many of the dogs have completed obedience classes? Five dogs of

grandymaker [24]

Let
x--------> number of dogs that completed the obedience class

we know that
total number of dogs=5
<span>Eighty percent of the dogs have completed obedience classes
so
x=0.80*5------> x=4

the answer is
4 dogs </span>have completed obedience classes

4 0

3 years ago

Read 2 more answers

Write an expression that represents the perimeter of the football field. Let x represent the length of the football field. Inclu

dlinn [17]

Expression with parenthesis: = 2 ( l + w)
Expression without parenthesis = 2l + 2w

The property we used is known as "Distributive Property"

Let, width = w
Length = w + 70

Perimeter would be: P = 2(w+70+w)
p = 2(2w+70)
p = 4w + 140

Hope this helps!

6 0

3 years ago

Thuy drives 270 miles in 6 hours. How many miles does Thuy drive in 13 hours

yan [13]

Answer:

Hi there!

The answer is;

585 miles per 13 hours

Step-by-step explanation:

270 miles per 6 hours

/6 to determine miles per hour

45 miles per 1 hour

× 13 to determine miles per 13 hours

585 miles per 13 hours

Hope this helps!

4 0

2 years ago