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Airida [17]
3 years ago
9

Evaluate 9 C 5 and 7 P 4

Mathematics
2 answers:
Vlad [161]3 years ago
7 0
9C5 = 9!/[5!(9-5)!

9C5 = 9!/(5!)(4!)

You finish.

7P4 = 7!/(7-4)!

7P4 = 7!/3!

You finish.
Elina [12.6K]3 years ago
3 0

Answer:

126

Step-by-step explanation:

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Given a circle with a radius of 6, what the the length of an arc measuring 30 degrees
Mazyrski [523]
\bf \textit{arc's length}\\\\
s=\cfrac{\theta \pi r}{180}\quad 
\begin{cases}
r=radius\\
\theta =angle~in\\
\qquad degrees\\
------\\
r=6\\
\theta =30
\end{cases}\implies s=\cfrac{30\cdot \pi \cdot 6}{180}\implies s=\pi
6 0
4 years ago
Can someone help me with this?
deff fn [24]

Answer:

the answer is 200

Step-by-step explanation:

4 0
4 years ago
Please help I don’t get this
mina [271]

Answer:

H = 11m

Step-by-step explanation:

As we know, volume = length * breadth/width * height

Given,

length = 6m

Breadth/width = 3 1/2 or 3.5

Height = ?

So, l * b * h = v

=> 6m * 3.5m * h = 231m

=> 21m * h = 231m

=> h = 231m /21m = 11m

Therefore, height = 11m / 11metres

Hope this helps

6 0
3 years ago
5^(2x-1)+5^(x+1)=250<br> how do you solve?<br> thank you
zepelin [54]

Answer:

<em>x = 2</em>

Step-by-step explanation:

<u>Exponential Equations</u>

Solve:

5^{2x-1}+5^{x+1}=250

Separate each exponential:

5^{2x}5^{-1}+5^{x}5^{1}=250

Operating:

\displaystyle \frac{5^{2x}}{5}+5^{x}5=250

Multiplying by 5:

5^{2x}+25\cdot5^x=1250

Rearranging:

5^{2x}+25\cdot5^x-1250=0

Recall that:

5^{2x}=(5^{x})^2

(5^{x})^2+25\cdot5^x-1250=0

Calling

y=5^{x}:

y^2+25y-1250=0

Factoring:

(y-25)(y+50)=0

There are two possible solutions:

y=25

y=-50

Since

y=5^{x}

y cannot be negative, thus:

5^{x}=25=5^2

The solution is:

x = 2

8 0
3 years ago
If you have x, and your equation is 5/8x + 1/5x=99, what is x
noname [10]

\frac{5}{8x}  +  \frac{1}{5x}  = 99 \\  \\  \frac{33}{40x}  = 99  \\ \\ 40x = 33 \times 99 \\  \\ x = 81.675
8 0
3 years ago
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