Question

algebra

Answer 1

@campbell_st

Answer 2

I just did this this earlier today.

Answer 3

this one its another the one we did was 9/10

Answer 4

@mathstudent55

Answer 5

Ok.
Let x = amount of $15/oz perfume
Let y = amount of $35/oz perfume
x + y = 3 this is Eq. 1

Answer 6

The equation above is the4 equation of the amounts of perfume used.
Now we need an equation with the costs of the perfume used.
15x + 35y = 63 this Eq. 2

Answer 7

Now you have 2 equations.
Solve the system of equations.

Answer 8

Since you only want to know the amount of the $15/oz perfume, you need to find x.
Solve the first equation for y.
y = 3 - x
Now substitute this in the second equation.
15x + 35(3 - x) = 63
15x + 105 - 35x = 63
-20x + 105 = 63
-20x = -42
x = 2.1

Answer 9

The answer is 2.1 oz of the $15/oz perfume.