Raidriar

Let us go through this with PEMDAS. You first start with exponents, where (-1)^2 = 1. Now it is -(1) - 4(-1) -3 = 0.

The negative in front of 1 makes it -1, and -4 times -1 becomes 4. Now it is -1 +4 -3 = 0. You now add and subtract, -1 + 4 equals 3, and 3 -3 = 0.

70% is .7 in decimal form, which when multiplied times 600 equals 420.

To calculate the odds of a situation happening when given other chances, you multiply the chance of each event happening against eachother. In this case, you have a 60% chance of getting stuck, and an 80% chance of needing a tow if you are stuck. You could represent these as decimals, but fractions will suit them. 60% becomes 3/5, and 80% becomes 4/5. You multiply them together, getting 12/25, or a 48% chance of both happening.

To solve for x, you must get x by itself. You start doing this by dividing both sides by -5/6, which gives 9 + 2x = -48. We then subtract 9 from both sides, giving us 2x = -57. We then divide by 2, giving us x = -57/2 or -28.5.

To answer this, you must find the surface area of the roller using 2 * pi * r * h + 2 * pi * r², so we plug in 2 * pi * 1.5 * 6 + 2 * pi * 1.5². This gives us 70.6858347057703479, which we will round to 70.69 square feet. We then multiply this by twenty since it revolves twenty times, which gives us approximately 1,413.72 square feet.