2 years ago

what should be subtracted from x square - 2 X Y + Y square minus x + Y + 3 to obtain - X square + 4 x y - 3 y square + 1

Mathematics

1 answer:

Nimfa-mama [501]2 years ago

3 0

Step-by-step explanation:

refer the above attachment

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If x -1/7,evaluate x²+1/x²

SCORPION-xisa [38]

Answer:

$given \: x = - \frac{1}{7}$

$x {}^{2} + \frac{1}{x {}^{2} }$

$( - \frac{1}{7} ) {}^{2} + \frac{1}{ ( - \frac{1}{7} ) {}^{2} }$

$\frac{1}{49} + \frac{1}{ \frac{1}{49} }$

$\frac{1}{49} + \frac{1 \times 49}{1}$

$\frac{1}{49} + 49$

$\frac{2402}{49} \: or \: 49.02$

6 0

3 years ago

In how many ways can 6 students be chosen from 9 students if the order in which the

harkovskaia [24]

Answer:

60480

Step-by-step explanation:

This question has to do with permutations. A permutation is used to find the number of possible outcomes, assuming order matters. In this case, n=9 and r=6. This is written as $_{9}P_{6}$ which equals $\frac{9!}{(9-6)!}$ . Then, plug this into a calculator to get 60480.