Free points. Have a great holiday everyone!!

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

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