10 I think because 10+10+8+8=36 and 8 is 2 less than 10
This formula solve by discriminant (D=b^2-4ac)
I think its the first one
8/x= 2/5
8•5= 2•x
40=2x
40/2= x
20= x
Answer:
20
Step-by-step explanation:
20 x 2 =40
40 is under 58 and the closest to 58
the next 10 is 30 and 30 x 30 is over 58 with 60
