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elena-s [515]
3 years ago
14

3/5 of the students in a room are girls. 1/3 of the girls have blonde hair. 1/2 of the boys have brown hair.

Mathematics
1 answer:
frutty [35]3 years ago
6 0

one fifth of the boys in the classroom have brown hair.

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5y^2-6y-11-6y^2+2y+5
shusha [124]

Answer:

-y² - 4y - 6

Step-by-step explanation:

Step 1: Write expression

5y² - 6y - 11 - 6y² + 2y + 5

Step 2: Combine like terms (y²)

-y² - 6y - 11 + 2y + 5

Step 3: Combine like terms (y)

-y² - 4y - 11 + 5

Step 4: Combine like terms (constants)

-y² - 4y - 6

6 0
3 years ago
a web music store offers two version of a popular song. the size of the standard version is 2.9 megabytes (MB). the size of the
miv72 [106K]

Answer: 260 downloads of the standard version were there.

Step-by-step explanation:

Let x represent the number of downloads of the standard version.

Let y represent the number of downloads of the high-quality version.

Yesterday, the high-quality version downloaded four times as often as the standard version. It means that

y = 4x

The size of the standard version is 2.9 megabytes (MB). the size of the high-quality version is 4.6 MB. the total size downloaded for the two versions was 5538 MB. It means that

2.9x + 4.6y = 5538- - - - - - - - - - - -1

Substituting y = 4x into equation 1, it becomes

2.9x + 4.6 × 4x = 5538

2.9x + 18.4x = 5538

21.3x = 5538

x = 5538/21.3

x = 260

6 0
3 years ago
-3x + 7 = 1<br> what dose x represent
olchik [2.2K]

Answer:

the answer is x=3

Step-by-step explanation:

-3x=1-7

-3x=-6

-x=-6+3

-x=-3

x=3

3 0
3 years ago
Which is the missing step in the proof below? There is a 4th row that blank...
LuckyWell [14K]

Answer:

would go for C, SSS (side side side theorem)

6 0
3 years ago
Dale is trying to find the height of a triangular wall.
Tju [1.3M]
We certainly wish him all the best, and caution him to be careful.
4 0
3 years ago
Read 2 more answers
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