A group of students must collect at least $120 to organize a science fair. They have already collected $40. Which graph best represents the possible amounts of money the students still need to collect? Number line graph with closed circle on 80 and shading to the right.
Number line graph with closed circle on 120 and shading to the right.
Number line graph with closed circle on 40 and shading to the right.
Number line graph with closed circle on 160 and shading to the right.

1. 5/82.95% is better than 7/8

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!

The correct answer is b