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3 years ago

Solve the system of equations.

Mathematics

2 answers:

frutty [35]3 years ago

7 0

Answer:

Option (b) is correct.

The solution of given system of linear equations is x= 2 and y = 1.

Step-by-step explanation:

Given : System of linear equations

x + 3y = 5

-x + 6y = 4

We have to solve the given system of linear equations.

Consider the given system of linear equations.

x + 3y = 5 .........(1)

-x + 6y = 4 .........(2)

We will sole the system using elimination method.

Add both equation (1) and (2) and eliminate x , we have,

⇒ x + 3y + (-x + 6y) = 5 + 4

Simplify, we have,

⇒ 3y + 6y = 9

⇒ 9y = 9

Divide both side by 9, we have,

⇒ y = 1

Put y = 1 in equation (1) and solve for x, we have,

(1) ⇒ x + 3(1) = 5

⇒ x = 5 - 3

⇒ x = 2

Thus, the solution of given system of linear equations is x= 2 and y = 1.

kotegsom [21]3 years ago

4 0

Y = 2.
x = 0?
i believe I am correct about x but I am not sure.

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dangina [55]

Answer:

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Step-by-step explanation:

Standard Form of Numbers

Any number that we can write as a decimal number between 1.0 and 10.0, multiplied by a power of 10, is said to be in Scientific Notation. Some authors consider standard form and scientific form as the same, but others state that standard form is the common form of expressing numbers, i.e., a sequence of digits, separated by thousands by a comma, and separated from the decimal part by a dot.

We'll give here both answers.

We have to calculate:

$6.72\cdot 10^{5}+3.2\cdot 10^{4}$

Since the numbers don't have the same exponent, we must make them equal. Let's make the second number have an exponent of 5, by dividing by 10:

$6.72\cdot 10^{5}+3.2\cdot 10^{4}=6.72\cdot 10^{5}+3.2/10\cdot 10^{5}$

$6.72\cdot 10^{5}+3.2\cdot 10^{4}=6.72\cdot 10^{5}+0.32\cdot 10^{5}$

Now we add:

$6.72\cdot 10^{5}+3.2\cdot 10^{4}=7.04\cdot 10^{5}$

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Answer:

Step-by-step explanation:

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