-18 - 6k = 6 + 18k
help me please

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6