Solve using elimination.
-x – 5y = 16
2x + 5y = -7

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.