answer all pls, thank you!

1. The demand function N = -0.20p + 2500 takes p, the price of a particular consumer electronic, and gives N, the number of them that can be sold weekly The supply function N=0.30p - 1000 takes p, the price and gives N, the number of items the supplier will make. Find the price and number at the point of intersection (equilibrium point) Price: Number: 2. Bill can paint 20 square feet per minute with a roller, and Tom can paint 5 square feet per minute with a brush. The two of them need to paint a room that is 825 square feet. If Tom paints for twice as many minutes as Bill, determine how long each of them spends painting the room. Bill: Tom: 3. A bag of coins contains nickels and dimes. There are 1200 coins worth a total of $84.50. Determine how many of each type of coin are in the bag. Nickels: Dimes: 4. An investor has some stocks invested in company A, and some in company B. At the beginning of the month, the company A stocks were worth $90 each, the company B stocks were worth $70 each, and the total value of the stocks was $17,800. At the end of the month, the company A stocks were worth $100 each. the company B stocks were worth $90 each, and the total value of the stocks was $21.000. Determine how many of each type of stock the investor has Company A: Company B