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3 years ago

What’s an inverse operation?

Mathematics

1 answer:

yulyashka [42]3 years ago

4 0

The opposite of a equation. Such as addition will be subtraction

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How to find the value of the combination? Show your work! Thansk!

elena-14-01-66 [18.8K]

Answer:

Step-by-step explanation:

Using the definition

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

where n! = n(n - 1)(n - 2).... × 3 × 2 × 1

Then evaluating numerator and denominator

10 $C_{3}$

= $\frac{10!}{3!(7!)}$

= $\frac{10(9)(8)(7)(6)(5)(4)(3)(2)(1)}{3(2)(1)(7(6)(5)(4)(3)(2)(1)}$

Cancel 7(6)(5)(4)(3)(2)(1) on numerator/ denominator, leaving

= $\frac{10(9)(8)}{3(2)}$ = $\frac{720}{6}$ = 120

-------------------------------------------------------------------------------------

6 $C_{4}$

= $\frac{6!}{4!(2!)}$

= $\frac{6(5)(4)(3)(2)(1)}{4(3)(2)(1)(2)}$

Cancel 4(3)(2)(1) on numerator/ denominator, leaving

$\frac{6(5)}{2}$ = $\frac{30}{2}$ = 15

-------------------------------------------------------------------------------------

Dividing numerator by denominator gives

$\frac{120}{15}$ = 8 → A

4 0

3 years ago

Kathy began with a balance of $96.54 in her checking account this month. She deposited $175.88 and wrote checks for $83.70, $56.

BaLLatris [955]

Answer:

B. 240.85 i think yan po yung sagot

4 0

2 years ago

Christopher has a credit card with an APR of 13.13%. The card uses the adjusted balance method to calculate finance charges. The

Sergio [31]

Answer: the answer is <u>D.$513.74</u>

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

The edges of a cube are 5 cm each and the diaganol of a face is approximately 7 cm what is the approximate area of the cross sec

xxTIMURxx [149]

Answer:

The approximate area is 35 square centimeters

Step-by-step explanation:

we know that

The cross section passing through the diagonal of opposite faces of the cube is a rectangle

the approximate area is equal to

$A=bh$

where

b is the diagonal of a face

h is the length side of the cube

we have

$b=7\ cm\\h=5\ cm$

substitute

$A=7(5)=35\ cm^2$

7 0

4 years ago

How many significant figures are in the number 120?

Lelu [443]

Answer:

1 and 0

Step-by-step explanation:

they tell us what hundred and that it IS a hundred

3 0

3 years ago

Read 2 more answers