If xy>0 and yz<0, which of the following must be negative?

Created: 1 month ago | Updated: 2 weeks ago

xyz

xyz2

zy2z

xy2z2

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which one is true for the mathematical expression $\frac{2^{n} + 2^{n - 1}}{2^{n + 1} - 2^{n}} ?$

Created: 1 month ago | Updated: 2 weeks ago

\frac{3}{2}

\frac{2}{3}

2^{30}

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$2^{30} + 2^{30} + 2^{30} + 2^{30} = ?$

Created: 1 month ago | Updated: 1 month ago

8^{120}

8^{30}

2^{32}

2^{30}

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In a student dormitory there was enough food to feed 300 students for 15 days. Because of admission of some new students, the food only lasted for 10 days. How many new students were admitted to the dormitory?

Created: 1 month ago | Updated: 1 month ago

100

১২৫

১৫০

175

২০০

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In the correctly worked addition problem shown, where the sum of the two-digit positive integers AB and BA is the three-digit integer AAC, and A, B, and C are different digits, what is the units digit of the integer AAC?

Created: 1 month ago | Updated: 2 weeks ago

৯

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Company K'a earnings were Tk. 12 million last year. If this year's earnings are projected to be 150% greater than last year's earnings, what are Company K's projected earnings this year?

Created: 1 month ago | Updated: 1 month ago

Tk. 13.5 million

Tk. 18 million

Tk. 27 million

None of these

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If xy>0 and yz<0, which of the following must be negative?

Related Questions

which one is true for the mathematical expression 2n+2n-12n+1-2n?

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In a student dormitory there was enough food to feed 300 students for 15 days. Because of admission of some new students, the food only lasted for 10 days. How many new students were admitted to the dormitory?

In the correctly worked addition problem shown, where the sum of the two-digit positive integers AB and BA is the three-digit integer AAC, and A, B, and C are different digits, what is the units digit of the integer AAC?

Company K'a earnings were Tk. 12 million last year. If this year's earnings are projected to be 150% greater than last year's earnings, what are Company K's projected earnings this year?

which one is true for the mathematical expression $\frac{2^{n} + 2^{n - 1}}{2^{n + 1} - 2^{n}} ?$

$2^{30} + 2^{30} + 2^{30} + 2^{30} = ?$