Answer:
Step-by-step explanation:So we know x + y = 21 and 5x +10y = 165 We line them up in columns x + y = 21 5x +10y = 165 To eliminate the x variable, I'll multiply every element in the 1st equation by -5. -5x + -5y = -105 5x + 10y = 165 Now we combine (add) the equations, which eliminates x altogether. 5y = 60 ... y = 12 From there, x + 12 = 21 ... x = 21-12 ... x = 9 You should double check. Do 9 nickles and 12 dimes equal $1.65? A very important thing to remember using this method is to do the same thing to each element in the equation that you change! I hope that helps.
Answer:
Victoria can Make 2 more Italian sodas
Step-by-step explanation:
She had 3 but used one so 3 - 1 = 2 then she has two more so 2 + 1 = 3
Answer:
The Radius of the base, r, and the altitude h
Step-by-step explanation:
Surface area of a right cone

R= Radius
H=Radius
I believe the answer is x = 3.5. may be wrong though