The triangle inequality says that, given a triangle, the sum of the lengths its two smaller sides must be at least the length of the largest side. Looks like we have a triangle whose sides measure 1.3 cm, 4.1 cm, and 8.4 cm. The two smaller sides are 1.3 cm and 4.1 cm, which add to 5.4 cm, but 5.4 is smaller than 8.4.
So no, these sides can't compose a triangle.
X+_=-7 and x+_=-4. Add 7 and 4 to each side to get (x+7) and (x+4). You want to FOIL these next, so (x+7)(x+4) = x^2+4x+7x+28. Now you just need to combine like terms, and BAM. There's your answer.
You should get something like x^2+11x+28 (:
4/5 + 6v. 2 times 2/5 equals 4/5. 2/5 times 15 equals 30/5v which simplifies to 6/1v or 6v
You did not show us the graph but this is what it would look like.
I think you are supposed to make the fraction equivalent so you know that 27/9 is 3, so you would do the same thing whatever number is supossed to be under 17 needs to equal to 2 when divided by 9. So you should probably know that 3 * 9 is 18 so x needs to be a number that when subtracted by 5 gives you 18. So x=23. Hope this is right and it helps!
