What unit of measurement would you use to weigh an adult?
2 answers:
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The two linear equations in two variable is:
12 x + 3 y = 40
7 x - 4 y = 38
(a) For a system of equations in two Variable
a x + by = c
p x + q y = r
It will have unique solution , when
As, you can see that in the two equation Provided above
So, we can say the system of equation given here has unique solution.
(b). If point (2.5, -3.4) satisfies both the equations, then it will be solution of the system of equation, otherwise not.
1. 12 x+3 y=40
2. 7 x-4 y=38
Substituting , x= 2.5 , and y= -3.4 in equation (1) and (2),
L.H.S of Equation (1)= 1 2 × 2.5 + 3 × (-3.4)
= 30 -10.20
= 19.80≠ R.H.S that is 40.
Similarly, L H S of equation (2)= 7 × (2.5) - 4 × (-3.4)
= 17.5 +13.6
= 31.1≠R HS that is 38
So, you can Write with 100 % confidence that point (2.5, -3.4) is not a solution of this system of the equation.
You can only add exponents if you are multiplying two of the same variable together. For example,
You take them away if you are dividing.
<span>
In a polynomial equation, you can add together two of the same variable if they have the same exponent
</span>
Or you can take them away in a similar fashion,
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But you cannot add two (or more) different exponents,
</span>
(it does not get any simpler)
I hope this has answered your question, if not, leave a comment and I'll update the answer.
You take them away if you are dividing.
<span>
In a polynomial equation, you can add together two of the same variable if they have the same exponent
</span>
Or you can take them away in a similar fashion,
<span>
But you cannot add two (or more) different exponents,
</span>
I hope this has answered your question, if not, leave a comment and I'll update the answer.