Oh my gosh,
I need an answer for that as well..
Answer:
n=3
Step-by-step explanation:
5n+3=18
subtract 3 from both sides
5n=15
divide by 5 on both sides
n=3
Let's say that Robbie's age is represented by r and Sheila's age is represented by s. Since we know that r is greater than s, we can set up a difference equation of r - s = 12. We also know that r + s = 42. Now, we can simply add the two equations and get that 2r = 54, then finally that r = 54. Therefore, Robbie is 54 years old.
Hope this helps!
<span> Multiplication by Frans van Galen ... strips (for the multiplication tables) and explore the relationships between the .... a series of investigations based on the context of a cardboard box factory.</span>
Answer:
Common Difference is subtracting 6
Step-by-step explanation: