Which of the following three side lengths would form a triangle a)2 ft, 3ft, and 7ft
b)3ft, 1 ft, and 2ft
c)10ft, 5ft, and 7ft
d)20ft, 10ft, and 5ft
PLEASE HELP

The graph below shows the amount of money left in the school’s desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the school’s desk fund decrease?

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

What is r i 4.5+10r=-6.5 with work pls