Answer:
Step-by-step explanation:
20. First find the values of the numbers being added.
[tex](\frac{3}{4})^3 = \frac{27}{64}[/tex]
[tex](\frac{5}{8} )^2 = \frac{25}{64}[/tex]
These numbers have a common denominator, so you can add the numerators
27 + 25 = 52
so the number comes out to [tex]\frac{52}{64}[/tex]
to simplify, divide the numerator and denominator by 4.
So the final fraction becomes [tex]\frac{13}{16}[/tex]
However the question doesn't have this answer and now I am confused. I assumed that the expression was [tex]r^{3}+s^{2}[/tex] but the picture is a little bit blurry and I have bad eyesight so let me know if it is not. I'm too tired to delete this so next problem.
21.
4x + 8x + 7 + 4
Combine the like terms to get the expression
12x + 11 the answer is c.
