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3 years ago

Simplify 12x -18y+3x-3y

Mathematics

2 answers:

Art [367]3 years ago

7 0

Answer:

15x-21y

Step-by-step explanation:

12x+3x-18y-3y = 15x-21y

Elza [17]3 years ago

3 0

The answer is
15x-21y

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marin [14]

Answer:

153.586 close to 154 students

Step-by-step explanation:

mean=61

standard deviation =10

sample 450 students , x between 61 and 71

(x-mean)/deviation for score 61 and 71

61-61/10=0

71-61/10=1

the z-scores is between 0 and 1 ( use calculator)

the percentage is 0.3413 close to 34%

number of students that score between 61 and 71=

450*0.3413= 153.586 close to 154 students

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3 years ago

Help me pls due in 5 mins

Drupady [299]

Answer: $215\ cm^2$

Step-by-step explanation:

Given

Here the given figure can be divided into two shapes i.e. rectangle and a trapezium

For rectangle ABCD Area = $10\times8=80\ cm^2$

Area of trapezium CEFD Area is $\frac{1}{2}[\text{sum of non-parallel sides}]\times[\text{distance between them}]$

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3 years ago

Draw a diagram and solve the problem below to see how far Cecil went on the tightrope.

lakkis [162]

It’s 19 thththtththt

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The age of Sita is five years more than Gautam's age. 5 years ago, the ratio of their ages was 3:2. Find their present ages.

vampirchik [111]

<h2>Question:-</h2>

The age of Sita is five years more than Gautam's age. 5 years ago, the ratio of their ages was 3:2. Find their present ages.

<h2>Solution:-</h2>

The age of Sita = (x + 5) years.

And, the age of Gautam = x years.

Now,

5 years ago, the ratio of their ages was 3 : 2

$\therefore$ $\bf \frac{3}{2} \: = \frac{x \: + \: 5}{x}$

Now by cross multiplying, we get,

3x = 2(x + 5)

3x = 2x + 10

3x - 2x = 10

Hence, the age of Sita = (x + 5) = (10 + 5) = 15 years.

And, the age of Gautam = x = 10 years.

Now,

The present age of Sita = 15 + 5 = 20 years. (Answer)

And, the present age of Gautam = 10 + 5 = 15 years. (Answer)

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