[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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