Pola wants 3 oz of a 20% solution. she has only 5% and 30% available. how many oz of each should she mix to get what she wants?

Question

anonymous · Answer

x+y =3 oz
.05*x + .3*y = .2*3

anonymous · Answer

could you please solve the equations..i dont know how to....

anonymous · Answer

and why did u multiply .2 by 3

anonymous · Answer

what class are you taking?

cwrw238 · Answer

Algebraic multiplied 0.2 by 3 because thats the amount of substance in 3 oz of solution
(0.2 = 20%)

anonymous · Answer

math 130- intermediate algebra

anonymous · Answer

should be no problem for you to solve.  very simple substitution.

anonymous · Answer

ok. thnks

anonymous · Answer

when pppl give yu best responses yur smart score goes up huh?

anonymous · Answer

yes.

anonymous · Answer

i multiplied the top equation by -.3 so that i could cancel out the y value and after i solved i got x= -.21

anonymous · Answer

solve for either x or y, your choice:
x+y =3 

sub.s into:
.05*x + .3*y = .2*3