For the first question, it is easiest to figure out if you get each of the equations in the y=mx+b format, where m=slope. Option A goes from 4y + 4x = 5 to y = -x+5/4 (this is done by subtracting 4x from both sides of the first equation, then dividing both sides by 4). The slope for option A is -1 because it is the number before x. Option B goes from 4y + x = 5 to y = -1/4x + 5 (this is done by performing the same steps outlined above for option A). The slope for option B is -1/4 Option C goes from y - 4x = 5 to y = 4x + 5 (this is done simply by adding 4x to both sides of the first equation). The slope of Option C is 4. Option D goes from 4 + 4x = 5 to y(or in this case, 4) = -4x + 5 (this is done simply by subtracting 4x from both sides of the first equation). The slope of Option D is -4, so this is your answer. For the second question, it is easier if you line these up like you do any other subtraction problem: 3x^2 + 6x - 5 - 7x^2 - 5x + 1 _____________ -4x^2 + x - 4 you can only add and subtract things with like terms, so 3x^2 - 7x^2 becomes -4x^2. 6x +- 5x becomes 1x or simply, x. -5 + 1 becomes -4. When you put those all together into one result, you get -4x^2 + x - 4. Hope this helps!
