Zach is 3 years older than twice his sister maya’s age.
let m represent maya’s age and z represent zach's age.
which equation represents zach’s age?
z = 2m
z = 3m + 2
z = 2m + 3
z = m + 3

Alonso walked with his friend andy one day, and wanted to compare their speeds. alonso walked 3 miles in one hour, and andy walked 2 miles in 2 hours. complete the table to graph the relationship for each person.

Can some one me with these questions

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