Answer:
Step-by-step explanation
So mean is average
So total 26 hours studied
and there are 20 students
so 26/20
= 1.3
This is what I get
First is to get them to perfect squares . R27 = r9^3
S30= s10^3
=(a-b)(a^2+ab+b^2)
Where a=r9 and b=s10 (R9-s10)((r9)^2+r9+s10+(s10)^2) Now simplify To get
(R9-s10)(r18-r9+s10+s20)
2x1+(1+7)+(7x2)➡️ 3+(8)+(14)➡️25
Frank is correct.
bdhdjsbss
If you substitute a variable for each blank, for example x*2+x*3 you get 5x=12, which can then be solved to get that x=12/5, so 12/5 is the answer.