The sum of two numbers is 28. If the sum of squares of two numbers is the smallest, please find them.

#2

The difference between the two numbers is 16 ... If the sum and product of these numbers add up to the minimum, please find these numbers.

#3

The uniform border on the photo frame is the same as the area of the photo. If the size of the photo is 25 cm by 20 cm, what is the external size of the border?

#4

A bus company transports about 20,000 passengers at a fare of $90 every day. A survey shows that if the ticket price is reduced. By the year 2000, the number of cyclists will double for every $5 reduction. What kind of fares will bring the most benefits?

#6

A lifeguard drew a rectangular swimming area on the beach with a 200-meter-long rope. What is the maximum water area that she can enclose?

The sum of 1.n different natural numbers is less than 50. The maximum possible value of n is-

2. Let A be the average of all odd prime numbers less than 50. The closest inreger to a is-

3. If the square of two even numbers X and Y satisfies the equation X plus 100 equals the square of Y, and X is greater than Y, then X times Y equals-

F (x) = x (1-2x) 3 What is an equation of the tangent of the graph at point (1,-1)?

A.y= -7x+6

B.y= -6x+5

C.y= -2x+ 1

D.y= 2x-3

E.y= 7x-8

1 If the product of two positive integers is a prime number, what must be the value of the smaller integer?

climax

2. The M mark on the cliff is below sea level1.96m at high tide. The sea level at low tide is 4. 18m lower than that at high tide.

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|1.96m.

M *

|

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low tide

The problem is: at a certain moment, the sea level is just in the middle of high tide and low tide. How far is the sea level below m at this time?

3. The product of prime factors of 168 and 324 is

168=2^3 * 3 * 7 324=2^3 * 3^4

Question: Is 168 n a small positive integer value of n that is a multiple of 324?

4. It is required to find a rational number equal to the cyclic decimal 0.737373 ...

Question: so it is expressed as 0.737373 ... in the form of a/b, where a and b are integers?

5. Find out the score between1317 and 14/ 17 in the simplest form?

The price of each of the 50 seats in the front row of the cinema is half that of the remaining seats. There are 200 seats in total, and the total revenue after each seat is $525.

Question: Find out the price of front row seats in the cinema.

7. An athlete runs 1 km at an average speed of 6 km/h, and then runs 800 meters in 2 minutes without stopping.

Question: What is his average speed in the whole journey?