Melanie has 137 dollars in total.
Let each book cost=x
No of books=17
So total cost of 17 books=17x
After buying books Melanie left with 11 dollars
According to question the required equation will be=
17x+11=137
17x=137-11=126
x=8
i.e Price of each book is 8 dollars. (Answer)
Answer:811.5
Step-by-step explanation:
Sorry But I can't understand what − means so i will solve this for x+3 and x-3
first for x+3
equation e= x(x+3)(x+4)>0
so points are x= 0,-3,-4
for range x<-4
e<0
for -4<x<-3
e>0
for -3<x<0
e<0
and for x>0
e>0
so the interval when e>0
x â (-4<x<-3 and x>0)
now for x-3
equation e=x(x-3)(x+4)>0
so points are x= 0,3,-4
for range x<-4
e<0
for -4<x<0
e>0
for 0<x<3
e<0
and for x>3
e>0
so the interval when e>0
x â (-4<x<0 and x>3)
Answer:
Step-by-step explanation:
discriminant = (-24)² - 4(9)(16) = 0, so there are two identical roots.
That eliminates choices 2 and 4.
Quadratic formula
x = [24 ± √(24² – 4·9·16)] / [2·9]
= 24 / 18
= 4/3
9x² - 24x + 16 = 9(x-4/3)² = (3x-4)²
Answer:
1.5<x<4 i hope this is right sorry if its not
Step-by-step explanation:
