Answer:
there is only one easy way to sole this
using quadratic equation
Step-by-step explanation:
a=6 b=5 c=-6
and by applying it to the equation you will get
x=0.66 and x=-1.5
To solve this problem, you must use the Combination Formula:
Cr(n,r)=n! /r!(n-r)!
n: The number of things it can be chosen (n=6).
r: The number of things you choose (r=3).
!: The symbol of The Factorial Function, which means that descending numbers are multiplied.
In Combinations the order of the objects does not matter, so we have:
Cr(n,r)=n!/r!(n-r)!
C(6,3)=6!/3!(6-3)!
C(6,3)=6!/3!
C(6,3)= 6x5x4x3!/3x2x1x3!
C(6,3)=6x5x4/3x2x1
C(6,3)=120/6
C(6,3)=20
In how many ways can a student select any 3 books?
The answer is: In 20 different ways.
Answer:
probably A
Step-by-step explanation:
12 would be right since 3-12 would be 9 then 9 times 2 is 18.
About 8.5 hours too drive