Rodney is 3 times as old as his sister.A year ago, he was 4 times as old. How oldare Rodney and his sister now?
How do you fiqure this out?
Rodney = 3*sister
Rodney-1 = 4*(sister -1)
solve that out.
Have you figured out the answer to this yet because we have the same question.
Rodney is 9. His sister is 3.
rodney is 9 and his sister is 4 I came up with the answer because 3X3 is 9 and a year ago he would have been 8 which 2X4 is 8 but when trying to explain this so my 4th grade neice will understand is a little hard i came up with the answer but don't just want to give it to her i want her to be able to solve it on her own any suggestions how i can explain it to her so she can understand
sorry now rodney is 9 and his sister is 3 because 3x3 is 9 and 2x4 is 8
To solve this problem, we can set up equations based on the information given.
Let's say Rodney's age is denoted by R and his sister's age is denoted by S.
From the first statement, we know that Rodney is 3 times as old as his sister: R = 3S.
Now, let's consider the second statement that a year ago Rodney was 4 times as old as his sister: R - 1 = 4(S - 1). This equation represents the age difference between Rodney and his sister a year ago.
To find the current ages of Rodney and his sister, we can solve this system of equations simultaneously.
Rearranging the first equation, we have S = R/3.
Substituting this value into the second equation, we get R - 1 = 4((R/3) - 1).
Simplifying, we have R - 1 = 4R/3 - 4.
Bringing all the terms to one side, we have 3R - 3 = 4R - 12.
Solving for R, we get R = 9.
Substituting this value back into the first equation, we find S = 9/3 = 3.
Therefore, Rodney is currently 9 years old and his sister is currently 3 years old.
So, Rodney is 9 years old and his sister is 3 years old.