Answer:
j=76 and k=65
Step-by-step explanation:

Let
x-------------> <span>the price of each cup
</span>y-------------> the price of each plate
we know that
5x+3y=28.50----------> equation 1
and
x=y-6.30--------------> equation 2
I substitute 2 in 1
5*(y-6.30)+3y=28.50---------> 5y-31.5+3y=28.5-----> 8y=60
y=7.5
x=y-6.3---------> x=7.5-6.3---------> x=1.2
the answer is
the price of each cup is $1.2
the price of each plate is $7.5
100 because 99.9999 nearest to any number on there would be 100
That both (along with the mean) help the data be described the data's spread, which can be the slope if only two points.
Im pretty sure it was d when i took the test hopefully im corecct sorry if im not