Maria = x
Tom = y
Use substitution
x+y=30
2y=x
2y+y=30
3y=30
y=10
Tom is 10 years old.
x+y=30
x+10=30
x=20
Maria is 20 years old.
Answer: The correct answer is (A) - 60/7 :)
Step-by-step explanation: The answer is A because all of the other ones make absolutely no sense one bit at all...!
Answer:
128kg
Step-by-step explanation:
I don't know how to explain it here the answer
Last choice the area becomes 25 times greater
Answer:
1. C
2. D
3. B
Step-by-step explanation:
