Convert to decimal 6 2/8

A-6.625
B-3.25
C-3.75
D-6.25

Use the x-intercept method to find all real solutions of the equation.x^3-10x^2+27x-18=0

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of