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2 years ago

14

Find the value of x that makes the equation true 3 ( x- 8 ) + 2x = 76

1 answer:

vovikov84 [41]2 years ago

7 0

Answer:

x = 20

Step-by-step explanation:

3 (x-8) +2x = 76

3x - 24 +2x = 76

3x+2x = 76+24

5x = 100

x = 20

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pashok25 [27]

Answer:

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Step-by-step explanation:

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3 years ago

What is the average diastolic blood pressure for adults

kolezko [41]

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the average diastolic blood pressure for adults is 120/80 mmHg

Step-by-step explanation:

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8 0

3 years ago

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Solve for x. 3x−82=x−6 Enter your answer in the box. x =

My name is Ann [436]

Get like terms together. you might have to move across the equals sign

3x-x=-6+82

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2 years ago

Is the following true for all positive values of a and b: If a^2>b^2, then a>b

Dominik [7]

Answer:

Yes, that is correct.

Step-by-step explanation:

a would always have to be greater than b since you're just multiplying each variable by itself.

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3 years ago

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The area of the regular pentagon is 6.9 cm2. What is the perimeter? 2 cm 5 cm 10 cm 20 cm

disa [49]

Given

Area of the regular pentagon is 6.9 cm².

Find out the perimeter of a regular pentagon

To proof

Formula

Area of regular pentagon is

$= \frac{1}{4}\sqrt{5(5+2\sqrt{5})}\ a^{2}$

As given in the question

area of regular pentagon = 6.9 cm²

now equating the area value with the area formula.

$6.9 =\frac{1}{4}\sqrt{5(5+2\sqrt{5})} a^{2}$

Now put

√5 = 2.24 ( approx)

put in the above equation

$\frac{6.9\times 4}{\sqrt{5(5+2\times2.24)}}=a^{2}\\\frac{27.6}{\sqrt{47.4}}=a^{2}\\\frac{27.6}{6.88}=a^{2}$

thus

a² = 4.01

a = √ 4.01

a = 2.0 cm ( approx)

As perimeter represented the sum of all sides.

i.e regular pentagon have five sides of equal length.

Thus

perimeter of the regular pentagon = 5 × side length

= 5 ×2.00

therefore the perimeter of the regular pentagon = 10cm

option c is correct

Hence proved

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3 years ago

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