6. at a school supply store, the price of three
notebooks plus a $30 backpack is the same as the
price of 11 notebooks. which of the following
equations can be used to find the price of each
notebook?
a 3x = 11x + 30
b 3x + 30 = 11x
c 30 = 3x + 11x
d 3x - 30 = 11x

First, look for some of the key words in the word problem.

Plus, is the same as the...

Now we can use those key words and translate it into an equation.

You don't know the price of 3 notebooks, so you should put: 3x

Instead of saying plus, we can say: +

It says "...3 notebooks plus a $30 backpack..." so we add 30.

Instead of saying "is the same as the", we can say: =

You don't know the price of 11 notebooks either, so you should put: 11x

Now, put together the equation:

3x + 30 = 11x

There is your equation! Match it up with one of the given answers and you will receive B.

75

step-by-step explanation:

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.