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3 years ago

2x + y = 33х - 2y = 8

Mathematics

2 answers:

s344n2d4d5 [400]3 years ago

8 0

..........................I'm just trying

astraxan [27]3 years ago

8 0

this is right plz check ❤️

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How many 3-digit numerical passwords are there if a digit cannot be repeated?

alexgriva [62]

The first digit of the password can be any of the ten digits - 10 possibilities.
A digit cannot be repeated, so the second digit can be any digit except the one you chose for the first digit - 9 possibilities.
The third digit can be any digit except the digits you chose for the first and second digit - 8 possibilities.

Using the rule of product:
$10 \times 9 \times 8=720$

There are 720 passwords.

5 0

3 years ago

QUESTION 2

Mekhanik [1.2K]

Answer:

3/30 =1/10

Step-by-step explanation:

add up the number of balls and then

number of black balls divided by the total number of balls.

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4 years ago

1/3 rd part of the length of a bamboo is coloured in red and 1/5th part of it is coloured green and the remaing is 14m is colour

aksik [14]

$\bold{\huge{\blue{\underline{ Solution }}}}$

$\bold{\underline{ Given :- }}$

1/3rd part of the length of a bamboo is coloured with red and 1/5th part of it is coloured with green and the remaining is 14m is coloured with yellow.

$\bold{\underline{ To \: Find :- }}$

We have to find the total length of the bamboo

$\bold{\underline{ Let's \: Begin :- }}$

Let the total length of bamboo be x

According to the question, 

$\sf{\dfrac{ 1}{3}}{\sf{x +}}{\sf{\dfrac{ 1}{5}}}{\sf{x + 14 = x }}$

$\sf{\dfrac{ 1}{3}}{\sf{x + }}{\sf{\dfrac{1}{5}}}{\sf{x = x - 14 }}$

$\sf{\dfrac{5x + 3x}{15}}{\sf{ = x - 14 }}$

$\sf{ 5x + 3x = 15( x - 14 )}$

$\sf{ 8x = 15x - 210 }$

$\sf{ 210 = 15x - 8x}$

$\sf{ 7x = 210 }$

$\sf{ x = }{\sf{\dfrac{ 210}{7}}}$

$\sf{\red{x = 30\: m}}$

Hence, The total length of the bamboo is 30m.

6 0

2 years ago

A salesperson earns a base salary of $1,380 per month and a commission of 7.5% on the amount of sales made. If the salesperson h

Korvikt [17]

$1,380 per month and a commission of 7.5% can be translated to
$1,380 + 7.5s, s = sales made within the month

salesperson has a paycheck of $4,132.50
$4,132.50 = $1,380 + 7.5s

4,132.50 - 1380 = 1,380 + 7.5s - 1380 --- Subtract 1380 from both sides

2752.5 = 7.5s --- Simplified

(2752.5)/7.5 = (7.5s)7.5 ---Divide both sides by 7.5

367 = s

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3 years ago

The two triangles below are similar.

Fynjy0 [20]

The ratio of the corresponding side lengths are 2:7:5

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3 years ago

2x + y = 33х - 2y = 8​

2x + y = 33х - 2y = 8