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2 years ago

In how many ways can 13 students be selected from a group of 15 students to serve on a chalkboard-cleaning team?

Mathematics

1 answer:

Romashka [77]2 years ago

3 0

Answer:

13/15

Step-by-step explanation:

in this case, you'd have a chance of 13/15 to be picked on a chalkboard cleaning system. and you'll have a chance of 2/15 of not being picked.

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I need help ASAP!!

Studentka2010 [4]

Answer:

D. (x-5)^2 = 36

Step-by-step explanation:

If you add 11 to the given equation, you get ...

x^2 -10x = 11

Then you can add the square of half the x-coefficient to complete the square.

x^2 -10x +25 = 11 +25

(x -5)^2 = 36 . . . . simplify to the appropriate form

5 0

3 years ago

Can someone Help Me With The Answers?

gayaneshka [121]

Answer:

5 1/3 x 2 3/4= 3/4 5 x 2 = 10

Step-by-step explanation:

Multiply fractions 1/3 x 3/4= 3/4

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4 years ago

What is 4/8 divided by 7/8

kifflom [539]

Answer: 4/7

Step-by-step explanation:

4/8 / 4/7

now you do multilpication so,

4x8

over

8x7

32/56 divided by 56/8=

4/7

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8 0

3 years ago

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What is the average cost of 7 articles if 3 of them cost 30k each and the rest cost 12.5k each

LenKa [72]

${\bold{\red{\huge{\mathbb{QUESTION}}}}}$

what is the average cost of 7 articles if 3 of them cost 30k each and the rest cost 12.5k each

$\bold{ \red{\star{\blue{GIVEN }}}}$

TOTAL NUMBER OF ARTICLE= 7

ARTICLES FOR 30K = 3

ARTICLES FOR 12.5K = 7-3= 4

$\bold{\blue{\star{\red{TO \: \: FIND}}}}$

Average cost of 7 articles

$\bold{ \green{ \star{ \orange{FORMULA \: USED}}}}$

$\red{AVERAGE = \frac{TOTAL \: COST}{ NUMBER \: OF\: ARTICLES }}$

$\huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}$

$Average \: cost \: of \: 7 \: articles - > \\ \frac{(3 \times 30k) + (12 .5k \times 4)}{7} \\ \frac{90k + 50k}{7} \\ \frac{140k}{7} \\ \blue {Average \: cost \: of \: 7 \: articles - >} \\ 20k$

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3 years ago

<img src="https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20%2B%2010%20-%2021%20%3D%20y" id="TexFormula1" title=" {x}^{2} + 10

myrzilka [38]

Answer:

Step-by-step explanation:

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3 years ago

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