Alright, let's do all of these (though this is a bit long). 1. The constant is 1.8. All other values are coefficients to variables, which as the name implies will change. 2. 1 hour is 60 minutes, 1 minute is 60 seconds. So, 4.2 *60 *60 = 15120 seconds. 3. <span>−5x−4(x−6)=−3-5x-4(x-6)=-3 Let's move all x to one side, and all other numbers to another. -5x-4(x-6)=-3-5x-4(x-6)=-3 x can be any value you want, if you actually solve this you'll only end up with -3 = -3, which is correct, of course. Let me show you: </span><span>−5x−4(x−6)=−3-5x-4(x-6)=-3 +5x +4(x-6) +5x +4(x-6) -3 = -3 The value of x is irrelevant, then. X can be any real number. 4. I'm going to assume it was an error in printing with this? If not please correct me. m=a+2b(or b2) subtract 2b from each a=m-2b (This question seems kind of odd. We should probably address this in the comments.) 5. </span><span>5(x−2)<−3x+6 Move all x to one side, numbers to other. 5x-10<-3x+6 +3x +3x +10 +10 8x<16 /8 <span>x < 2 </span>6. y-3=3(x-5) alright, to find zeros set one variable to zero and solve x first -3=3x-15 +15 +15 3x=12 /3 x=4 x-int is (4,0) now y </span>y-3=3(0-5) y-3=-15 +3 +3 y=-12 so y-int is (0,-12) i've got to sleep now so i'll do the rest tomorrow. Sorry for the incomplete answer.
