It's geometry, help him with a problem number of 28 please.
Answer:
Please check the explanation!
Step-by-step explanation:
Given the polynomial




so expanding summation

solving




also solving






similarly, the result of the remaining terms can be solved such as




so substituting all the solved results in the expression


Therefore,

Answer:
$36
Step-by-step explanation:
20x.80=16
20+16=36
Hence, the original price is $36
I prefer to use fractions for some irrational numbers.
For example, 1/3 is equal to an infinite 0.3333333333333333...
Answer:
$16.90
Step-by-step explanation:
20% of $84.80 is $16.90