Hello :
answer : <span>C) x= -3 or x=5
because :
x=-3
2(-3)²-(-3)-15 = -3(-3+1)
18+3-15 =6
21-15 = 6....right
x=5
2(5)²-5-15 = 5(5+1)
50-20 =30
30=30.....right</span>
Answer:
12.25 miles
Step-by-step explanation:
We can write a proportion to solve. Miles over time in minutes
1 hour = 60 minutes
1 hours 10 minutes = 60+10 = 70 minutes
3.5 miles x miles
--------------- = --------------
20 minutes 70 minutes
Using cross products
3.5 *70 = 20x
245 = 20x
Divide each side by 20
245/20 = 20x/20
12.25 =x
Jimmy can go 12.25 miles
Answer:
20
Step-by-step explanation:
apply BODMAS
10*2+3+2-5
20
We effectively rewrite the equation as
In order for the LHS to be defined, we need to restrict 
, or 
. Now, the LHS will vanish when the numerator is 0, which happens for
This value is indeed smaller than 4, so the solution is 
.
