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alexgriva [62]
3 years ago
14

Simplify. (5x^3y^2+x^2-6x^2y^3) - (3x^2y^3-4y^3+7x^2)

Mathematics
1 answer:
Zanzabum3 years ago
5 0

Answer:

Step-by-step explanation:

The initial expression is:

(5x^{3}y^{2}+x^{2}-6x^{2}y^{3})-(3x^{2}y^{3}-4y^{3}+7x^{2})

Using BEMDAS (Brackets - Exponents - Multiplication - Division - Addition -Subtraction), we first start with brackets:

5x^{3}y^{2}+x^{2}-6x^{2}y^{3}-3x^{2}y^{3}+4y^{3}-7x^{2}

Remember that if there is a negative sign, it will change the signs of the terms within the brackets.

Then, collecting like terms:

5x^{3}y^{2}-9x^{2}y^{3}+4y^{3}-6x^{2}

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1. Addition
nexus9112 [7]

Answer:

1. Exponent

2. Multiplication

3. Subtraction

4. Square root

5. Addition

6. Division?

<em>Note: I am not very sure about my answer because of two things. 1. The proper order for operating is PEDMAS (Parentheses, Exponent, Multiplication, division, addition, and subtraction). There is no Square root in that operation so I will consider it in the middle. 2. There is no division operation in this problem.</em>

4 0
3 years ago
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What is the ratio of ounces to pounds
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Answer: 16 ounces : 1 pound
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3 years ago
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A researcher wants to estimate the mean commute time of residents in Westchester County. The researcher samples 40 commuters and
Ksenya-84 [330]

Answer:

21.759

Step-by-step explanation:

Given that :

Mean (m) = 25

Standard deviation (s) = 12.5

Sample size (n) = 40

α = 90%

The confidence interval is obtained using the relation:

Mean ± Zcritical * s/sqrt(n)

Zcritical at 90% confidence interval = 1.64

25 ± 1.64 * (12.5/sqrt(40))

Lower boundary : 25 - 1.64(1.9764235) = 21.75866546

Upper boundary : 25 + 1.64(1.9764235) = 28.24133454

(21.759, 28.241)

Hence, lower bound of confidence interval is : 21.759

4 0
2 years ago
Divide 800ml into ratio 3:7
Black_prince [1.1K]
Simply take the numerator (3) and denominator (7) and add them together. 

3+7 = 10, which means that the ratio will provide parts that are in multiples of 10 depending on the total

so take 10x = 800 

x = 80.

Then multiply this by the numerator and denominator 

3*80/7*80 = 240/560. 
7 0
3 years ago
The scale model of a building is 5.4 feet tall. If the original building is 810 meters tall, what was the scale used to make the
ANEK [815]
1 meter = 3.2808399 feet 

<span>810m * 3.2808399 ft/m </span>
<span>2657.48 feet </span>

<span>2657.48/5.4 </span>
<span>492.12592593 </span>

<span>Scale </span>
<span>1:492 </span>
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3 years ago
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