Simplify (-4/5) ÷ (3/-2)

Please help!!!

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr

Which function represents the sequence? f(n)=n+3 f(n)=7n−4 f(n)=3n+7 f(n)=n+7