8 ''Pears have a greater mass'' because 1000g is equal to 1kg and so the pears are 1,200g it would be 1.2k > 1k... hope it helps you :)
for a line the letters can be either way it can be DC or CD either way it is the same line being represented. because the other lines are represented by other letters you can be either order.
69 out of 100 because if you turn 3/10 into a fraction with a like denominator as 39/100 you get 30/100 and then you add 39 and 30 and get 69/100
Let x represent the number of grandstand seats on race track #2
The number of grandstand seats on race track #1 = 37,000 + 3x
Total number of seats together = 289,000
So, we can frame the equation as follows:
37,000 + 3x + x = 289,000
4x + 37,000 = 289,000
4x = 289,000-37,000 = 252,000
4x = 252,000
x = 252,000/4
x = 63,000
Number of seats on race track #2= x = 63,000 seats
Number of seats on race track #1 = 37000+3x = 37000+3*63000 = 226,000 seats
