In a class of 40 students, 30 read Mathematics and each student read
at least one subject
illustrate this on a venn diagram

Two fire-lookout stations are 190 miles apart, with station a directly south of station b. both stations spot a fire. the bearing of the fire from station a is upper n 55 degrees upper e and the bearing of the fire from station b is upper s 60 degrees e. how far, to the nearest tenth of a mile, is the fire from each lookout station?

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b