The cost of 3 boxes of envelopes and 4 boxes of notebook paper is $13.25. two boxes of envelopes and 6 boxes of notebook paper cost $17. find the cost of each.

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels