Number Systems Choose any system of numeration (Egyptian, Roman, Mayan, Chinese, Hindu-Arabic, Greek, Babylonian, etc.) and answer the following questions: Is it an additive, multiplicative, or ciphered system? Why? Is there a radix or base? What is it? Is there a schema or rule for combining the numerals to represent numbers? Briefly describe the rule(s).

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?