Why is a fixed interest rate almost always better than a variable interest rate

Aswim teacher sells lesson packages. the best deal has the highest ratio of lessons to total cost.swim lesson packagesnumber of lessons total cost$10$4010 1 $8015$80which package is the best deal? l lesson for $105 lessons for $4010 lessons for $8015 lessons for $80mark this and returnsave and exit

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.