几道英文数学题请教 急
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几道英文数学题请教 急
请帮我写出公式
1. a spacecraft countdown is at -8second.in how many seconds will the spacecraft be 15second into its flight.
2. the melvilles sell records at a flea market every saturday.on 4 saturday in june,they had a profit of$30,lost$20,lost$40,and had a profit of $60.how much was their profit or loss in june
请帮我写出公式
1. a spacecraft countdown is at -8second.in how many seconds will the spacecraft be 15second into its flight.
2. the melvilles sell records at a flea market every saturday.on 4 saturday in june,they had a profit of$30,lost$20,lost$40,and had a profit of $60.how much was their profit or loss in june
![几道英文数学题请教 急](/uploads/image/z/1160750-38-0.jpg?t=%E5%87%A0%E9%81%93%E8%8B%B1%E6%96%87%E6%95%B0%E5%AD%A6%E9%A2%98%E8%AF%B7%E6%95%99+%E6%80%A5)
1.15-(-8)=23s
2.30-20-40+60=30
So their profit in June is $30
2.30-20-40+60=30
So their profit in June is $30