-4(x + 3) = -12 - 4x

Mathematics

1 answer:

ivann1987 [24]3 years ago

3 0

Answer:

4x+12=12+4x

16x=16x

0=0

prove 0=0

You might be interested in

Need help on 39 please

julsineya [31]

That is actually easier thatn it looks

here is a tip
write that thing apart since they are all multiplication like this:
V=(1/3)pir^2 h
now just divide the whole equaiton by ((1/3)pir^2)
or if you don't like dividiing by fracitons, times both sides by 3/1 to clear fraction to get
3V=pir^2h
divide both sides by pir^2
(3v)/(pir^2)=h

8 0

3 years ago

Members from 6 different school organizations decorated floats for the homecoming parade. How many different ways can first, sec

Alex

<h3>Answer: 120 different ways</h3>

=======================================================

Explanation:

There are...

6 ways to select the first place winner
5 ways to pick the second place winner
4 ways to pick the third place winner

We start with 6, and count down by 1 each time we fill up a slot. We stop once the third slot is filled or accounted for. The countdown is to ensure that we don't pick the same person twice. From here, multiply those values: 6*5*4 = 30*4 = 120

Interestingly, this is equal to 5! = 5*4*3*2*1 = 120 because the 3*2 becomes 6 and that *1 at the end doesn't affect things. Though usually results of permutation problems don't always end up like this. The order matters because a result like ABC is different from BAC, where A,B,C,D,E,F are the six school organizations.

As a slightly longer way to do the problem, you can use the nPr formula which is $_nP_r = \frac{n!}{(n-r)!}$ where n = 6 and r = 3 in this case. The exclamation marks indicate factorial. If you go this route, you should find that one of the steps will involve 6*5*4.