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3 years ago

18 = 3 + 5x for x. A. 1 B. 2 C. 3 D. 4

Mathematics

2 answers:

Lostsunrise [7]3 years ago

8 0

Answer:

Step-by-step explanation:

Ket [755]3 years ago

7 0

Answer:

C. 3

Step-by-step explanation:

subtract 3 from both sides

15 = 5x

Divide by 5 on both sides

3 = x

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3 years ago

The volume of a cylinder of radius 3r and height 6r is given by TT(3r)2(6r). Simplify the expression.

OLga [1]

Answer: $\pi 36r^{2}$

Step-by-step explanation:

ALRIGHT ARE YOU READY FOR EPIC MATH TIME?

because i know i am. so lets get this bread.

WATCH: we have $\pi (3r)2(6r)$

interesting... that first character is called pi. maybe i should have said, "lets get this pi".

so now lets do some algebra. i am going to work from right to left. lets multiply 6r by 2. that gives us 12r. now we have... $\pi (3r)(12r)$

WE ARE MAKING EPIC PROGRESS, AREN'T WE?

lets multiply 12r by 3r. then we have....

$\pi 36r^{2}$

notice how i multiplied 12 by 3 and also r by r (which gives 36 and $r^{2}$ respectively)

so your simplified expression is: $\pi 36r^{2}$

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