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:
a) Ans: 8.5 miles per hour
b) Ans: 46.75 miles
Step-by-step explanation:
a) Speed = Distance/Time
8.5/1h = 8.5 miles per hour
b) Distance = Speed x Time
8.5 miles per hour x 5.5h = 46.75 miles
Since all of these numbers have the same variable they can all be added up to get a sum of 10a which is its simplified form.
Answer:
An expression equivalent to 5 (x + 10) is <em>5x + 50.</em>
Answer:
-6x is the slope
Step-by-step explanation:
1,-3
2,-9
-9+3 is -6
2-1 is 1
-6/1 is -6
