A friend bought 2 boxes of pencils and 8 notebooks for school and spent $11.00. He went back to the store the same day to buy supplies for his younger brother. He spent $11.25 on 3 boxes of pencils and 5 notebooks. Write and solve a system of equations

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

Hello!
volume of sphere =4/3.pi.r^3

Ithink if ur looking for a ratio it would be 12: 3