35(r-45)
or is there a comma missing and you want 35(r) - 45?
35 multiplied by the quantity r less than 45
5 answers
or maybe 45 - 35r
or even 35r < 45
Look what a little punctuation does to change mathematics...
I think quantity "r less than 45" means r-45. A crystal ball comes in handy trying to interpret many of the problems posted on Jiskha.