Use the substitution method to sloved the systmem of equaions. choose the correct order pair x+y=12 -x=-y-10

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

Kevin's bank offered him a 4.5% interest rate for his mortgage. if he purchases 3 points, what will be his new rate?