1。 Two cars, A and B, left cities A and B at the same time. Four hours later, car A traveled 80% of the whole journey, and car B exceeded the midpoint 13 km. It is known that car A travels 3 kilometers more than car B. How many kilometers is there between A and B?

The shopping mall sent a batch of washing machines and color TV sets. There are three times as many color TV sets as washing machines. Now we sell 10 washing machines and 15 color TV sets on average every day. After the washing machine was sold out, the 120 color TV was still unsold. How many washing machines and color TVs did the mall send?

Uncle Zhang buys a house by installment: one payment method is to pay 50,000 yuan in advance in the first year. Annual payment10000; Another payment method is to pay 14000 yuan per year in the first half of the year and 10000 yuan per year in the second half. The total payment period of the two payment methods is the same. If you pay in one lump sum, you can pay less 16000 yuan. Now that Uncle Zhang has paid the payment in one lump sum, how much will he pay?

The price of a tape recorder is 5/2 1 of that of a TV set. Buy 4 tape recorders and 3 TV sets for a total price of 7470 yuan. How much is this tape recorder and TV set?

1) Original price of a toothpaste 15 yuan. In order to promote sales, the price was reduced, so the sales volume increased by 2 times and the income increased by 3/5. Q: How much is the reduction for a box of toothpaste?

(2) Two cars, A and B, travel from A to B, with a speed of 65 kilometers per hour and a speed of 42 kilometers per hour. The B train starts two hours before the A train leaves. How many hours later, car A passed car B by 8 kilometers?

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