Use the quadratic formula, the second, the 6th answers are correct.
100 kilometers you solve with a proportion 2/20=10/x
2x=200 so x=100
Answer:
=7x^2+6x+6y-15
Step-by-step explanation:
First things first, you will have 94 + x. Place those on top of a fraction bar and on the bottom put the two numbers over 2. So you have 94 + x over 2. Then, write the symbol ‘greater than or equal to’ and on the other side place your 90. So, 90 + x over 2 is greater than or equal to 90. This is a difficult thing to write out and explain so I hope this makes sense. :)