Marie about six books for total $360 math books cost 80 and science books cost 50 how many science books did she buy

1foot = 12 inches; 1 yard = 3 feet

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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