Anumber divided by -9 decreased by 18, is -17

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z