IXL | Identify equivalent expressions: word problems

Billy's family is going to relax at the beach all day! In preparation, Billy made s sandwiches for them to eat when they get hungry. Billy put 3 slices of turkey and 3 slices of ham on each sandwich.

Pick all the expressions that represent how many slices of meat Billy used on the sandwiches.

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question

Martin took 4 piano lessons last month. For each lesson, he memorized 2 major scales and x minor scales.

Pick all the expressions that represent how many scales Martin memorized last month.

(

)

solution

You can find how many scales Martin memorized in more than one way.

One way:
Multiply how many piano lessons Martin took by how many scales he memorized for each lesson.

Martin took 4 piano lessons.
Martin memorized
(
2
+
x
)
scales for each lesson. Add the number of major scales for each lesson, 2, to the number of minor scales for each lesson,
x.

So,

(

)

is one way to find how many scales Martin memorized.

Another way:
Add how many major scales Martin memorized to how many minor scales he memorized.

Martin memorized 8 major scales. Multiply the number of piano lessons, 4, by the number of major scales for each lesson, 2.
Martin memorized
4
x
minor scales. Multiply the number of piano lessons, 4, by the number of minor scales for each lesson,
x.

So,

is one way to find how many scales Martin memorized.

Notice that the correct answers are equivalent expressions:

4
(
2
+
x
)
8
+
4
x

The other answer choices are not equivalent to these.

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Lesson: Equivalent expressions

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