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2 years ago

Geometrical prove that a + b x a minus b is equals to a square minus b square

Mathematics

2 answers:

bekas [8.4K]2 years ago

8 0

Answer:

see explanation

Step-by-step explanation:

(a + b)(a - b)

each term in the second factor is multiplied by each term in the first factor, that is

a(a - b) + b(a - b) ← distribute parenthesis

= a² - ab + ab - b² ← collect like terms

= a² - b²

Akimi4 [234]2 years ago

5 0

Step-by-step explanation:

a² + b²

difference of two square

= (a + b)(a - b)

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Solve for x: 1/3(3x+6)+5x>20

olasank [31]

Answer:

$x > 3$

Step-by-step explanation:

$\frac{1}{3} (3x + 6) + 5x > 20 \\ x + 2 + 5x > 20 \\ 6x + 2 > 20 \\ 6x > 18 \\ x > 3$

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3 years ago

the density of silver is 65.2g/cm3. if the volume of a piece of silver is 21.4cm3, what will the mass be in grams

lukranit [14]

Answer:

mass - 1395.28 g

Step-by-step explanation:

density = mass / volume

65.2 g/cm^3 = mass / 21.4 cm^3

65.2 g * 21.4 = mass (cm^3 cancels out)

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3 years ago

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djverab [1.8K]

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3 years ago

a salesperson receives a 2.5% commission on sales. what commission does the salesperson receive for $8000 in sales?

Burka [1]

To find the amount we need to multiply
2.5% × 8000

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3 years ago

suppose that during one period of extreme cold the average daily temp decreased 1 1/2 Fahrenheit each day how many days did it t

Nina [5.8K]

Answer:

The temperature decreased by 9 °F in <u>6 days.</u>

Step-by-step explanation:

Let the number of days it takes for the temperature to decrease by 9 °F be $x$ .

Given:

Average daily temperature decreases by $1\frac{1}{2}$ °F.

Decrease of temperature in 1 day = $1\frac{1}{2}$ = 1.5 °F.

∴ Decrease in temperature in x days is $1.5x$ .

Now, as per question, decrease in temperature in 'x' days is 9 °F.

Therefore, $1.5x=9$

$x=\frac{9}{1.5}$

$x=6$

Therefore, the temperature decreased by 9 °F in 6 days.

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3 years ago

Geometrical prove that a + b x a minus b is equals to a square minus b square​

Geometrical prove that a + b x a minus b is equals to a square minus b square