Jesse filled his car with 8 gallons of gas and it cost $22 the cost to fill your gas tank varies directly with the number of gallons you purchase . how many gallons of gas did a person purchase if their cost was $41.25 ?

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- 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. 3- 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 part b?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?