If you were to solve the following system by substitution, what would be the best variable to solve for and from what equation?
1 answer:
Answer: B. x, in the second equation
Step-by-step explanation:
The given system :
To apply the substitution method , first we need to select the best variable and a equation which is easy to simplify.
From the given system equation (2) have all the numbers which are multiples of 3.
Then we divide 3 on both sides of equation (2), we get
Therefore, the best variable to solve for and from what equation is x, in the second equation.
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First we shall convert those millions to complete number.
We know 1 million is 1,000,000
So 134.8 millions shall be
= 134.8 × 1,000,000
= 134,800,000
Now we shall convert this to the standard form.
As there are 8 digits after 1, we shall have 8 as the exponent of 10 in the standard form
So
134,800,000
= 1.348 ×
134.8 million in standard form is 1.348 ×