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3 years ago

Solve this linear system 28x + 44y = 964.40 21x + 33y = 723.30

Mathematics

1 answer:

Sladkaya [172]3 years ago

3 0

28x + 44y = 964.40

21x + 33y = 723.30

Let's multiply the first equation by 4 and the second by -4

84x + 176y = 3857.6

-84x - 132y = -2893.2

Add the equations together.

0 + 44y = 964.4

Simplify

44y = 964.4

Divide both sides by 44

y = 964.4/44

Since we have the value of y, let's plug 964.4/44 into y for the first equation.

28x + 44(964.4/44) = 964.40

Simplify the left side

28x + 964.4 = 964.4

Subtract 964.4 from both sides

28x = 0

Divide both sides by 0

x = 0

In conclusion,

y = 964.4/44

x = 0

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For the function F defined by F(x) = x2 – 2x + 4, find F(b+3).

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$\displaystyle F(b + 3) = b^2 + 4b + 7$

Step-by-step explanation:

We are given the function:

$\displaystlye F(x) = x^2 - 2x + 4$

And we want to find F(<em>b</em> + 3).

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kaheart [24]

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Step-by-step explanation:

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The given question is incomplete.

The set of numbers should be : -11, -5/6, 0, 0.75, $\sqrt5$ , $\pi$ , $\sqrt{64}$ ,

Step-by-step explanation:

a). Natural numbers : Natural numbers starts form 1 up to positive infinity. They are non negative integers.

The numbers are : $\sqrt{64}$

b). Whole numbers : Whole numbers are numbers which starts from 0 to positive infinity.

The numbers are : 0, $\sqrt{64}$

c). Integers : Integers are both positive and negative numbers including 0. But they are not fractional numbers.

The numbers are : -11, 0, $\sqrt{64}$

d). Rational numbers : The rational numbers are the whole numbers or may be fractions which are represented by divisions of any two integers, in the form of m/n.

The numbers are : -11, -5/6, 0, 0.75, $\sqrt{64}$

e). Irrational numbers: Irrational numbers are those numbers numbers which cannot be written in a fraction form. They are not rational numbers

The numbers are : $\sqrt5, \pi$

f). Real numbers : Real numbers are those numbers which do not have any imaginary component in it.

The numbers are : -11, -5/6, 0, 0.75, $\sqrt5$ , $\pi$ , $\sqrt{64}$ ,

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