Answer:
Kate 55 hours
Dave 70 hours
Sarah 35 hours
Step-by-step explanation:
Let k be Kate's hours
Dave = 15 + k
Sarah = k- 20
Dave + Kate + Sarah = 160
15 + k + k + k - 20 = 160
3k - 5 = 160
3k = 165
k = 55
Kate worked 55 hours
Dave worked 70 hours
Sarah worked 35 hours
Answer: 21 weeks
Explanation: Because 25 times 20 is 500 then add 25 more and it is 21 weeks. Which equals 1,400.00.
I would say the low I’m just guessing so get it checked
x = -3
55 + x + 74 + 54 = 180
x + 183 = 180
70% of 300 is 210