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2 years ago

Urgent Please Help Me!!!!!!!!!!!!

Mathematics

1 answer:

xz_007 [3.2K]2 years ago

8 0

Answer:

If use the area of the frame the area of the photo will be included

Area of frame = (22 + 2 x) * (20 + 2 x) = A

440 + 2 x ( 20 + 22) + 4 x^2 = A

A = 4 x^2 + 84 X + 440

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A committee must be formed with 5 teachers and 4 students. If there are 6 teachers to choose from, and 15 students, how many dif

ZanzabumX [31]

Answer:

8190 ways

Step-by-step explanation:

Given

$Teachers = 6$

$Students = 15$

Selection

$Students = 4$

$Teachers = 5$

Required

Number of ways of selection

4 students can be selected from 15 students in:

$Students= ^{15}C_4$

Similarly.

5 teachers can be selected from 6 teachers in:

$Teachers= ^{6}C_5$

So, the required number of selection is:

$Selection = ^{15}C_4 * ^6C_5$

Apply combination formula:

$Selection = \frac{15!}{(15-4)!4!} * \frac{6!}{(6-5)!5!}$

$Selection = \frac{15!}{11!4!} * \frac{6!}{1!5!}$

$Selection = \frac{15*14*13*12*11!}{11!*4*3*2*1} * \frac{6*5!}{1*5!}$

$Selection = \frac{15*14*13*12}{4*3*2*1} * \frac{6}{1}$

$Selection = \frac{32760}{24} * 6$

$Selection = 1365 * 6$

$Selection = 8190$

8 0

2 years ago

Solve for u.<br> -6=-2u +4(u-5)

sergij07 [2.7K]

Answer: u=7

Step-by-step explanation:

-6= -2u+4(u-5)

-6= -2u+4u-20

-6= 2u-20

14= 2u

7=u

5 0

2 years ago

Read 2 more answers

Helppppppp mathhhhhh

Maru [420]

5/3 is you answer!?!?!

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3 years ago

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Plz help LOL <br> 5(x-3)-x=

V125BC [204]

5(x-3)-x =
Multiply Everything In The Parentheses By 5
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2 years ago

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How ro divide a 6meter long board into 1/3

Serhud [2]

Divide 6 by 1/3. I don't know what you are asking.

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2 years ago