We can solve this problem using discriminant.
x^2-4x-12's discriminant is
(-4)^2-4*-12=16+48 which is clearly larger than 0
This means that it crosses over the axes 2 times.
In case you don't know what discriminant is, its in equation ax^2+bx+c
the discriminant is b^2-4ac.
If its positive it has 2 crosses with x axis, if negative then 0 crosses, if 0 then 1 cross.
Hope this helped at least a little bit :D
Answer:
$175
Step-by-step explanation:
let the original price be x
if 1/5 is off the price then the sells is at 4/5
4/5 of x = 140
thus,
4/5* x=140
4x = 140*5
x=700/4
x=$175
Answer:
Ten times a number minus 3 is greater than three times the number plus eleven
Step-by-step explanation:
we have the inequality
10x-3 > 3x+11
Let
x ----> a number
As a word problem will be
10x -----> Ten times a number x
+ ----> plus
-3 -----> negative 3
> greater than
3x ----> three times a number x
11 ----> eleven
therefore
Ten times a number minus 3 is greater than three times the number plus eleven
Answer:
the likehood that an n fell on the floor is 2 in 13.
Step-by-step explanation:
