Answer:
Tasha ordered 9 ounces of salad
Step-by-step explanation:
The complete question is
Tasha ordered soup and salad for lunch. The soup cost 15 cents per ounce, and the salad cost 20 cents per ounce. If Tasha ordered 10 ounces of soup for lunch and the total cost was $3.30, how many ounces of salad did
Tasha order?
Let
x -----> the ounces of soup ordered
y -----> the ounces of salad ordered
we know that
The ounces of soup ordered multiplied by their cost plus the ounces of salad ordered multiplied by their cost must be equal to $3.30
so
[tex]0.15x+0.20y=3.30[/tex] -----> equation A
[tex]x=10\ oz[/tex]
substitute the value of x in the equation A and solve for y
[tex]0.15(10)+0.20y=3.30[/tex]
[tex]1.50+0.20y=3.30[/tex]
Subtract 1.50 both sides
[tex]0.20y=3.30-1.50[/tex]
[tex]0.20y=1.80[/tex]
Divide by 0.20 both sides
[tex]y=9\ oz[/tex]
therefore
Tasha ordered 9 ounces of salad
