[数学]QR-12hiij猴哥难题

The operation ⊙ is defined for all real numbers x and y by the equation x ⊙y = x^2 + y^2 -xy. Each of the following must be true...

[数学]QR-82hilj猴哥难题

Rack A holds 80 pairs of slacks with prices ranging from $12 to $15 a pair,and rack B holds 60 pairs of slacks with prices ranging...

[数学]QR-c2hihj猴哥难题

If the total value of long-playing albums in 1985 was $1,280 million,then the average(arithmetic mean) selling price of a long-play...

[数学]QR-b2hioj猴哥难题

If the population of State [i]I[/i] had increased by the same amount each year from 1980 to 1988.approximately what would the popul...

[数学]QR-f2hibj猴哥难题

In 1990 for which of the selected sciences did the greatest percent of its graduate students have research fellowships?

[数学]QR-c2hi9j猴哥难题

A certain holiday is always on the fourth Tuesday of Month X.If Month X has 30 days,on how many different dates of Month X can the...

[数学]QR-02hicj猴哥难题

9/20 of 2.8 is

[数学]QR-92hidj猴哥难题

if there is an 80 percent increase from 1970 to 1995 in the number of households receiving monthly benefits,then the increase in ...

[数学]QR-72hiej猴哥难题

When the positive integer n is divided by 7,the quotient is q and the remainder is 4. When 2n is divided by 7,the remainder is 1...

[数学]QR-52hiaj猴哥难题

How many positive integers can be expressed as a product of two or more of the prime numbers 5,7,11,and 13 if no one product is to...

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