two exams were given to a certain mathematics class. On the first exam the mean was 64 and the standard deviation was 8. On the second exam the mean was 48 and the standard deviation was 12. The scores of 4 students

Atype of plant is introduced into an ecosystem and quickly begins to take over. a scientist counts the number of plants after mmonths and develops the equation p(m)= 19.3(1.089)^m to model the situation. most recently, the scientist counted 138 plants. assuming there are no limiting factors to the growth of the plants, about how many months have passed since the plants werefirst introduced? a)o 6.1b)0.6.6c)10 72d)o 23.1

Ithink i know it but i want to be sure so can you me out ?

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.