What can you say about the marked angles in these parallelogram? a opposite angles of a parallelogram are congruent. ( the same measure) b consecutive angles of a parallelogram are supplementary (measure add to 180) c consecutive angles of a parallelogram are congruent. (the same measure) d opposite angles of a parallelogram are supplementary (measure add to 180) need on this don’t understand this one

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no

Which choice has the correct steps in graphing the solution set to the following inequality? -45_> 20x-5y