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3 years ago

Is this all correct?

Mathematics

2 answers:

Dmitry_Shevchenko [17]3 years ago

6 0

Yes seth your answers are all corret i seen them i did that paper too

masya89 [10]3 years ago

5 0

Every thing is correct

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Evaluate the expression. StartFraction 9 factorial Over 3 factorial EndFraction 3 6 60,480 362,874

REY [17]

Answer:

60,480 is the correct answer.

Step-by-step explanation:

First of all, let us have a look at the formula of factorial of a number 'n':

$n! = n \times (n-1) \times (n-2) \times ...... \times 1$

i.e. multiply n with (n-1) then by (n-2) upto 1.

Keep on subtracting 1 from the number and keep on multiplying until we reach to 1.

So, $9!$ can be written as: $9 \times 8 \times 7 \times ...... \times 1$

Similarly $3!$ can be written as: $3 \times 2 \times 1$

Re-writing $9 !$ :

$9 \times 8 \times 7 \times ...... 3 \times 2 \times 1\\\Rightarrow 9 \times 8 \times 7 \times ...... 3 !$

Now, the expression to be evaluated:

$\dfrac{9!}{3!} = \dfrac{9 \times 8 \times 7 \times ..... \times 3!}{3!}\\\Rightarrow 9 \times 8 \times 7 \times 6 \times 5 \times 4\\\Rightarrow 60480$

5 0

3 years ago

Read 2 more answers

On a bulletin board, the principal, Ms.Gomez, put 115 photos of the fourth grade students in her school. She put the photo in 5

Basile [38]

I’m assuming you mean there are 5 rows which are equal, and use all the 115 photos. If this is the case then 115/5 is 23 photos per row.

4 0

3 years ago

Find the equation of the line specified. The line passes through the points ( 7, -7) and ( 6, -5)

dolphi86 [110]

Simple...

you have: (7,-7) and (6,-5)

Using $\frac{ y_{1}- y_{2} }{ x_{1}- x_{2} }$ to find slope--->>>

$\frac{-7--5}{7-6} = \frac{-2}{1}$

=-2

m=-2

Using y=mx+b to find the equation of the line-->>(Use any of the coordinates)

(7,-7)

-7=-2(7)+b

-7=-14+b

-7=-14+b
+14 +14

7=b

y=-2x+7

Thus, your answer.

6 0

4 years ago

HELP AND QUICK

marta [7]

Answer:

I think c if not ill give points back

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

At a charity fund raiser, adult tickets were sold for $11 each and children’s tickets were sold for $5 each. Write an algebraic

patriot [66]

9514 1404 393

Answer:

11a +5c
$4667

Step-by-step explanation:

If 'a' adult tickets are sold for $11 each, the amount of money they sold for is ...

11a

If 'c' children's tickets are sold for $5 each, the amount of money they sold for is ...

Then the expression for the total amount from the sale of tickets is ...

11a +5c . . . . total of money raised

The value of this expression for a=247 and c=390 is ...

11·247 +5·390 = 2717 +1950 = 4667

A total of $4667 was raised by the sale of tickets.

3 0

3 years ago