Answer:
17160
Step-by-step explanation:
first there are 13 options
then there are 13 - 1 that was chosen
then there are 13 - 2 that were chosen
then there are 13 - 3 that were chosen
so that's 13 options, then 12 options, then 11 options, and then 10 options
and in order to figure out all of the possibilties we mutiply the options so
13*12*11*10 = 17160
little further explaining of why this works:
we have a set of letters (3 in a set)
A B C
what are the possible combinations?
AB
AC
BC
BA
CA
CB
the answer is 6 which is also 3 * 2 * 1 = 6
HOPE THAT HELPS!1! ^_^
The ans is:
cos 20 =x/80
x=75.2
Answer:
0.943125.
Step-by-step explanation:
I used an website which is Desmos.com. it works great and is very helpful. you should give it a try.
Answer:
12 is
![t = \frac{3(r - v)}{2} \\](https://tex.z-dn.net/?f=t%20%3D%20%20%20%5Cfrac%7B3%28r%20-%20v%29%7D%7B2%7D%20%20%5C%5C%20)
13 is
![v = \frac{5}{9z - 9w}](https://tex.z-dn.net/?f=v%20%3D%20%20%5Cfrac%7B5%7D%7B9z%20-%209w%7D%20)
Step-by-step explanation:
Please mark as brainliest
Answer:
option (a) f(x)= 1/x+2
Step-by-step explanation:
(a) f(x) = 1/ x+2
To find the restriction for domain , we set the denominator =0 and solve for x
x+2 =0, so x=-2
When x=-2 then denominator becomes 0 that is undefined.
So, domain is all real numbers except -2
(b) f(x)= 2x
In this function, there is no denominator or square root or log function
so there is no restriction for x, hence domain is all real numbers
(c) f(x) = 2x-2
In this function, there is no denominator or square root or log function
so there is no restriction for x, hence domain is all real numbers
f(x) = 1/ sqrt(x+2)
if we have square root in the denominator then we set the denominator >0 and solve for x. because square root of negative values are undefined
x+2>0, x>-2
Hence domain is all real numbers that are greater than -2