in a school every student has to participate in at least one of the activities at letters on music in a class of 50 students 30 participated in athletics and 25 participated in music how many students participated in only one activityin our school ​

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Acircle has a radius of 12.6cm what is the exact length of an arc formed by a central angle measuring 120

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?