4b²+20b+25=0
Divide everything by 4
b²+5b+ 6.25=0
use the quadratic formula
x= (-b+ or - √b²-4ac) /2a
x= (-5 + or - √5²-4*1*6.25) /2(1)
x= -5/2 so
in this case, b= -5/2
Answer:
7 students.
Step-by-step explanation:
10% of 70 is 7.
Answer:
.A -42+(-17)
Step-by-step explanation:
B
5/4 times 4/5X=8/1 times 5/4
X=40/4
X=10
