Find the value of 4 a minus b if a equals 2/3 and B equals to 1/5​

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

Ibeg you to me 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?