Order the polynomial -x⁴y²+7x³y³-3xy⁵+2x²y⁴ in descending powers of x +2x²y⁴ -3xy⁵ -x⁴y² +7x³y³

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55