Answer:

Step-by-step explanation:
in the equation given these are the values:
a=1 b= -5 c= -7
if we plug this in the quadratic formula 
this is simplified to 
hope this helped
Step-by-step explanation:
it is solved directly by using the formula
Answer:
in 20 weeks the baby will weigh nothing and is definitely dead
Step-by-step explanation:
5% of 8 is . 4
.4 x 20 is 8
Answer:
8,3
Step-by-step explanation: