Answer two questions about Systems A
AA and
B
BB:
System
A
AA
start text, end text System
B
BB
{
x
−
4
y
=
1
5
x
+
6
y
=
−
5

⎩
⎪
⎪
⎨
⎪
⎪
⎧
​

x−4y=1
5x+6y=−5
​

{
x
=
1
+
4
y
5
x
+
6
y
=
−
5

⎩
⎪
⎪
⎨
⎪
⎪
⎧
​

x=1+4y
5x+6y=−5
​

1) How can we get System
B
BB from System
A
AA?

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Which expression shows the sum of the polynomials with like terms grouped together

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