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3 years ago

What is the answer to this problem because I need to do it-6-(+3)

Mathematics

2 answers:

Leviafan [203]3 years ago

7 0

-9 should be the answer

Bad White [126]3 years ago

3 0

Answer:

-9 would be the answer to this

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a cylinder has a diameter of 14 centimeters and a volume of 112pi cubic centimeters. what is the height, in centimeters, of the

OverLord2011 [107]

Formula for volume of a cylinder is
$v = \pi r^{2} h$

where r is the radius and h is the height

We can set v equal to 112π as we are given that.
We can set r to 7 as we are given the diameter, 14, and the radius is half of that.

$112 \pi= \pi 7^{2} h$

Simplify this equation,
$112 \pi = \pi *49*h$

Our goal is to to isolate h, as we are trying to find the height.
So divide 49π on both sides, $\frac{112 \pi }{49 \pi } = h$

The π's cancel out and we are left with
$h = \frac{112}{49}$ or 16/7 centimeters.

Hope this helped! :)

4 0

3 years ago

If a + b + c.= 5 and ab + bc +ca = 10 , then prove that a3+ b3+ c3-3abc = -25

Alex Ar [27]

Start with

$(a+b+c)^3=a^3+b^3+c^3+3(a^2b+a^2c+ab^2+ac^2+b^2c+bc^2)+6abc$

Given that $a+b+c=5$ , we know $(a+b+c)^3=125$ .

Also, $ab+bc+ca=10$ , so

$a^2b+a^2c+ab^2+ac^2+b^2c+bc^2=a(ab+ac)+b(ab+bc)+c(ac+bc)$

$=a(10-bc)+b(10-ca)+c(10-ab)$

$=10(a+b+c)-3abc$

$=50-3abc$

So we have

$125=a^3+b^3+c^3+3(50-3abc)+6abc$

$125=a^3+b^3+c^3+150-9abc+6abc$

$\implies -25=a^3+b^3+c^3-3abc$

QED

3 0

3 years ago

28.) A project has estimated annual net cash flows of

tiny-mole [99]

Answer:

7% return rate. Yeah, I am stuck on that one too.

Step-by-step explanation:

Do not know how to solve that.

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3 years ago

Nick payed $2.94 in sales tax on an item that casts $42.00 before tax. At that rate, how much would he pay in sales tax for an i

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She would pay $4.06 in taxes the total would be $62.06

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3 years ago

What is the distributive property of 6(5-9)

IgorC [24]

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