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3 years ago

Asphere and a cylinder have the same radius and height. The volume of the cylinder is 64 m3.

Mathematics

1 answer:

ValentinkaMS [17]3 years ago

8 0

Answer:

i just took it and i got it right so...

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Simplify 8 + 2(10 – r).

r-ruslan [8.4K]

8+20-2r which is equal to 28-2r so it is (B)

4 0

2 years ago

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Factorise 125x^3 -27y^3

telo118 [61]

Answer:

(5x - 3y)(25x² +15xy + 9y²)

Step-by-step explanation:

125x³ - 27y³ is a difference of cubes and factors in general as

a³ - b³ = (a - b)(a² + ab + b²)

Given

125x³ - 27y³

= (5x)³ - (3y)³

= (5x - 3y)((5x)² + (5x)(3y) + (3y)²)

= (5x - 3y)(25x² + 15xy + 9y²)

6 0

2 years ago

Given the function ƒ(x) = 5x2 − 9x + 18, find ƒ(3).

Crank

Answer:

f(3) = 36

Step-by-step explanation:

ƒ(x) = 5x^2 − 9x + 18

Let x =3

ƒ(3) = 5(3)^2 − 9(3) + 18

= 5*9 -27 +18

= 45 -27+18

=36

6 0

3 years ago

Find the value of y.

Leno4ka [110]

Answer:

$\sqrt{55}$

Step-by-step explanation:

Based off of what we do know, if we can find length DB we can use the pythagorous theorem (I will be assigning the variable z)

$x^{2} =36+z^{2} \\\\y^{2}=25+z^2\\\\x^{2} +y^2=121\\\\$

First equation is for triangle ABD

Second is for BCD

And the last one is for ACD

Substitute $x^{2}$ and $y^2$

$36+z^2+25+z^2=121\\\\61+2z^2=121\\\\2z^2=60\\\\z^2=30\\\\z=\sqrt{30}$

As discovered before

$y^2=25+z^2\\\\y^2=25+30\\\\y^2=55\\\\y=\sqrt{55}$

8 0

2 years ago

I NEEEEED HELLLLP with this question anybody know?

seropon [69]

Answer:

its 706.5

Step-by-step explanation:

do pi r^2

pi is 3.14

radius is 15

15 times 15 times 3.15 is 706.5

hope this helps

5 0

2 years ago

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