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3 years ago

The difference of 3 times a number and 17 is 5. Find the number.

Mathematics

1 answer:

exis [7]3 years ago

3 0

Answer:

Step-by-step explanation:

17-5=12

12 $division$ 3 = 4

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In a rectangle the ratio of the length to the width is 5/6. If the width is 30, find the length.

Over [174]

Answer:

the length of the rectangle is 25

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2 years ago

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it takes 5 men 35 minutes to peel a quantity of potatoes . How long will it take 3 men to peel the same quantity?

alisha [4.7K]

Answer:

175/3 minutes

Step-by-step explanation:

Assume that each man peel potatoes at the same rate

The time required

= 5 x 35 / 3

= 175/3 minutes

3 0

3 years ago

Please help. I don’t understand how to do this

Rasek [7]

Greetings from Brasil...

Let's apply the given formula:

A = (1/2)·B·H

The base of this polygon (in this case, the triangle) is B

B = X² - 2X + 6

The height of this polygon is H and is H

H = X + 4

Applying these values (B and H) in the given formula.....

A = (1/2)·B·H

A = (1/2)·(X² - 2X + 6)·(X + 4)

A = (1/2)·(X³ + 2X² - 2X + 24)

A = (X³/2) + X² - X + 12

A = (X³ + 2X² - 2X + 24)/2

4 0

3 years ago

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Help help help and help

Alexus [3.1K]

Answer:

x= 8.5 and y= 2

Step-by-step explanation:

6 0

3 years ago

Solve the equation in the complex number system. x^2-12x+40=0

mylen [45]

solving the equation $x^2-12x+40=0$ we get $x=6+2i\,\,and\,\,x=6-2i$

Step-by-step explanation:

Solve the equation:

$x^2-12x+40=0$

We can solve using quadratic Formula:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

a= 1, b = -12, c = 40

Putting values:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{-(-12)\pm\sqrt{(-12)^2-4(1)(40)}}{2(1)}\\x=\frac{12\pm\sqrt{144-160}}{2}\\x=\frac{12\pm\sqrt{-16}}{2}\\We\,\,know\,\,\sqrt{-1}=i\\ x=\frac{12\pm4i}{2}\\ x=\frac{12+4i}{2}\,\,and\,\, x=\frac{12-4i}{2}\\ x=\frac{4(3+i)}{2}\,\,and\,\, x=\frac{4(3-i)}{2}\\x=2(3+i)\,\,and\,\,x=2(3-i)\\x=6+2i\,\,and\,\,x=6-2i$

So, solving the equation $x^2-12x+40=0$ we get $x=6+2i\,\,and\,\,x=6-2i$

Keywords: Solving quadratic equation

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5 0

3 years ago