Please help me with questions 6
1 answer:
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ANSWER
EXPLANATION
The first polynomial is
The second polynomial is
If we add the two polynomials we obtain,
Next we group like terms to obtain,
We simplify the to obtain,
This is the sum of the two polynomials in descending powers of
Descending means from the highest power to the least.
EXPLANATION
The first polynomial is
The second polynomial is
If we add the two polynomials we obtain,
Next we group like terms to obtain,
We simplify the to obtain,
This is the sum of the two polynomials in descending powers of
Descending means from the highest power to the least.
<h2>Hello!</h2>
The answer is:
The correct option is:
A) Jeff, 4.5 hours; Julia 9 hours.
<h2>Why?</h2>To solve the problem, we need to write two equations using the given information.
So, writing the first equation we have:
We know that Jeff can weed the garden twice as fas as his sister Julia, so:
Also, from the statement we know that they can weed the garden in 3 hours, so, writing the second equation we have:
Then, we need to substitute the first equation into the second equation in order to isolate Julia's rate, so, solving we have:
We have that Julia could weed the garden by herself in 9 hours.
So, calculating how long will it take to Jeff, we have:
We have that Jeff could weed the same garden by himself in 4.5 hours.
Hence, the correct option is:
A) Jeff, 4.5 hours; Julia 9 hours.
Have a nice day!