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3 years ago

Brian was thinking of a number . Brian doubles it and gets an answer of 93.3.what was the original number?

Mathematics

2 answers:

just olya [345]3 years ago

8 0

Answer:

The answer is 49.65

Step-by-step explanation:

99.3 divided by 2 gives you the answer.

Paul [167]3 years ago

6 0

Answer:

46.65

Step-by-step explanation:

All you have to do is the reverse of what he did, so here he multiplied his number by 2 so we divide by to get the original number.

Hope this helped!

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A triangle with vertices A(0,0), B(6,0), and C(0,9) is rotated 360 about the y-axis. What is the volume of the figure?

Luden [163]

Given:

A triangle with vertices A(0,0), B(6,0), and C(0,9) is rotated 360 about the y-axis.

To find:

The volume of the figure.

Solution:

Points A(0,0) and C(0,9) lies on the y-axis. Length of AC is 9 units.

Points A(0,0) and B(6,0) lies on the x-axis. Length of AB is 6 units.

If a triangle with vertices A(0,0), B(6,0), and C(0,9) is rotated 360 about the y-axis, then it will form a cone with radius 6 units and height 9 units.

Volume of a cone is

$V=\dfrac{1}{3}\pi r^2h$

where, r is radius of the base and h is vertical height of the cone.

Putting r=6 and h=9, we get

$V=\dfrac{1}{3}\pi (6)^2(9)$

$V=\pi (36)(3)$

$V=108\pi$

Therefore, the volume of the figure is $108\pi$ sq. units.

7 0

3 years ago

The quotient of any two numbers, with the condition that the denominator is different from zero

elena-s [515]

Answer:

The quotient of any two numbers can be written as:

A/B

such that:

A, B ∈ {R}

Where {R} is the set of all real numbers.

But we also have the restriction that the denominator, B in this case, must be different than zero.

So we can define the set:

{R \ {0}}

As the set of all the real numbers minus the element 0.

So in this set we do not have the number zero, so now we can write our expression as:

A/B

A ∈ {R}, B ∈ {R \ {0}}

3 0

3 years ago

2x+5-x+10=1x-5+3x what does x=

NARA [144]

The answer for x=20/3

8 0

3 years ago

The sum of two numbers is 36 twice the first number minus the second number is 6 find the numbers

Ilia_Sergeevich [38]

Answer:

14, 22

Step-by-step explanation:

x+y = 36

2×x - y = 6

=> x = 36 - y

=> 2×(36 - y) - y = 6

72 - 2y - y = 6

-3y = -66

3y = 66

y = 22

=> x = 36 - 22 = 14

3 0

3 years ago

Factor the GCF: 30a3b4 + 20a2b2 - 15ab3. Please help

Blizzard [7]

Answer:

The GCF for the variable part is ab².

GCF<em>Variable</em>=ab²

Multiply the GCF of the numerical part 5 and the GCF of the variable part ab².

5ab²

Step-by-step explanation:

8 0

3 years ago