help solving word problem

Question

a firm charges $100 for labor for the first 10 feet each succeeding feet is $25 more than the preceding 10 feet. the next 10 feet will cost 125, the next 150 etc. how much will it cost to build a 90 foot tower

Answer 1

kost=100$+25(length-10)

for length=90...100$+ 9*25$

=100+225

=325$

Answer 2

make that 8*25=200$

Answer 3

Please can you help? I am horrible at problems, simple or hard I just can't seem to get them? What are rules how do you know where to add, subtract, divide or multiply?

Answer 4

1/4(x/3 -2)= -3/4

Answer 5

help please solving this problem f(t) = (10t - 9)4 + (10t + 9)4

 

Answer 6

Mr. Bert runs around a track in 30 seconds and you run around the track in 40 seconds if we both start at the same time how many seconds will it be until we both cross the same starting line together