What is a point-slope equation of the line with slope -10 that goes through the point (1,4)? a) y-4=-10(x-1)
b) y-4=10(x-1)
c) y+4=10(x+1)
d) y+4=-10(x+1)

Ihave trouble finding the nth term of a linear sequence

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

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