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2 years ago

19. Which is the suitable identity used to evaluate 9992 ?

Mathematics

1 answer:

andrew11 [14]2 years ago

5 0

Answer:

I suppose you mean 999^2

(1000-1)^2

which comes under the identity

(a-b)^2=

(a^2 + b^2 - 2ab)

hope this helps

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A textbook search committee is considering 13 books for possible adoption. The committee has decided to select 3 of the 13 for f

laiz [17]

Number of ways in which the 3 can be selected from 13 = 286

Step-by-step explanation:

Step 1:

Number of books considered by the textbook search committee = 13

Number of books selected from this 13 = 3

We need to determine number of ways in which the 3 can be selected from the 13

Step 2 :

The order of the 3 books selected does not matter. So,

Number of ways in which the 3 books can be selected from 13 books = C(13,3) = $\frac{13!}{10! . 3!}$

= $\frac{ 13 . 12 .11 . 10!}{10! . 3! }$

= $\frac{1716}{6}$ = 286

Step 3 :

Answer :

Number of ways in which the 3 can be selected from 13 = 286

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3 years ago

Can someone help me plz

OLEGan [10]

With where is it ?????

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3 years ago

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HELP!!! CORRECT ANSWER NEEDED OR ELSE I FAIL ;-; STUDY ISLAND !!

Ket [755]

Answer:

B. Step 2 uses the associative property, and step 3 uses the commutative property.

Step-by-step explanation:

The associative property lets you group terms for addition any way you like. It appears that in Step 2, the grouping is ...

4 + (1/6 + 3) + 5/6

The commutative property lets you change the order of any pair of terms involved in addition. It appears that in Step 3, the order of the terms within the group has been swapped.

4 + (3 + 1/6) + 5/6

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<em>Comment on associative and commutative properties</em>

What applies to terms in addition applies to factors in multiplication.

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2 years ago

Find the surface area of the cylinder. Type an exact answer in terms of pi.

Elodia [21]

Answer:

=150.79644...cm²

~150cm²

Step-by-step explanation:

cylinder surface area = 2 pi r h + 2 pi r²

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1 year ago

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Write a system of equations to describe the situation below, solve using substitution, and fill

BlackZzzverrR [31]

Answer:

Revenue and Expense = $230

No. of attendees: 10

Step-by-step explanation:

Let n be the no. of attendees

Expense = 50 + 18n

Revenue = 23n

Break even when:

50 + 18n = 23n

50 = 5n

n = 10

23n = 230

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3 years ago