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2 years ago

Please help me with this

Mathematics

2 answers:

Musya8 [376]2 years ago

5 0

Answer: False

Step-by-step explanation: When x is at least 2, x would be greater than or equal to 2. X cannot be less than 2. So, it should be x >= 2.

Hope this helped.

DaniilM [7]2 years ago

4 0

Answer:

false

Step-by-step explanation:

If it was at least 2, it would show x>= 2 which includes 2. However, that question doesn't include 2 so if it is true, it would have said "X is greater than 2"

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Can two fractions with the same numerator and different denominators be equal?

Ede4ka [16]

Answer:

Step-by-step explanation:

You can only have the same denominator

Example:

2 3 5

- + - = -

9 9 9

8 0

2 years ago

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

2 years ago

3y-y+8-2=20<br> combine like terms and solve

Flauer [41]

3y - y + 8 - 2 = 20
3y - y = 2y
8 - 2 = 6
2y + 6 = 20
2y = 20 - 6
y = 10 - 3
the answer is: y = 7

4 0

2 years ago

Step by step please -- algerbra 2<br><br> w(n) = 4n +2 ; find w(3n)

viva [34]

Answer:

12n+2

Step-by-step explanation:

w(n)=4n+2

w(3n)=4(3n)+2

w(3n)=12n+2

4 0

1 year ago

I need help on this problem!!! please help!!!

MA_775_DIABLO [31]

(0.1x-22)+(0.3x-54)=90

First combine like terms

0.4x - 76 = 90

Now add 76 on both sides

0.4x = 166

Divide by 0.4 on each side to isolate x

X= 415

7 0

2 years ago