3 years ago

Which congruency statements are true?

Mathematics

2 answers:

MArishka [77]3 years ago

7 0

Answer:

QH≅MF, MN≅QR, M≅Q,

djyliett [7]3 years ago

4 0

Answer: 1st answer, 2nd answer, and 4th answer

Step-by-step explanation:

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Answer:

d. 20

Step-by-step explanation:

The given question implies 5 permutation 2, i.e $_{5}$ $P_{2}$ .

But,

$_{n}$ $P_{r}$ = $\frac{n!}{(n - r)!}$

So that for $_{5}$ $P_{2}$ , n = 5 and r = 2.

$_{5}$ $P_{2}$ = $\frac{5!}{(5 - 2)!}$

= $\frac{5!}{3!}$

= $\frac{5*4*3*2!}{3*2!}$

Cancel out 3 and 2 with respect to the numerator and denominator.

$_{5}$ $P_{2}$ = 5 * 4

= 20

Therefore,

$_{5}$ $P_{2}$ = 20

So that the correct option is D.

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