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### [数学]QR-de3a7kXDF

In the figure above, the two circles are tangent to each other and each circle is tangent to three sides of rectangle PQRS. If the ...

### [数学]QR-f13a8kXDF

A certain teacher has a total of at least 110 students enrolled in her classes, If the teachers has an average (arithmetic mean) of ...

### [数学]QR-053a1kXDF

x>0>y(x+1)yx(y-1)

### [数学]QR-363a4kXDF

When Fred drives from his home to the nearest mountain resort, it takes 4 hours at an average speed of 50 miles per hour. When Fred ...

### c43a9kXDF

By how many million did the Unitied States population increase from 1920 to 1950?

### 733aakXDF

During which of the following 10-year intervals was the United States population increase the least in actual number?

### [数学]QR-0b3afkXDF

If the perimeter of an equilateral triangle is P, what is the altitude of the triangle in terms of P?

### [数学]QR-9f3a6kXDF

If x=y/5 and x=3-z then yz=

### [数学]QR-473aekXDF

If (x-2)(x+2)(x-3)(x+5)(x+9)=0, what is the ratio of the greatest possible value of x to the least possible value of x?_____

### [数学]QR-c83a2kXDF

The average(arithmetic mean) of 67,78 ,and 89 The average(arithmetic mean) of 66,78,and 89

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