Sal wants to know if he has enough money to buy 4 gallons of gas. if he has $15, and each gallon of gas costs $3.29, which is a good estimate for whether sal will be able to afford 4 gallons of gas? $3 + $3 + $3 + $3 = 12, so sal can afford the gas. $4 + $4 + $4 + $4 = 16, so sal can afford the gas. $3 + $3 + $3 + $3 = 12, so sal cannot afford the gas. $4 + $4 + $4 + $4 = 16, so sal cannot afford the gas.

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15

Mr. barth is painting an arrow on the school parking lot. he plots the arrow on the coordinate plane as shown below. what is the area of the arrow he is painting?