Read the word problem below. antonio has a total of 55 marbles. he has 15 green marbles and 12 red marbles. the rest of the marbles are blue. how many blue marbles does he have? a student solves this problem by writing an equation. which strategy could check the student’s answer?

There are 28 blue marbles.

Step-by-step explanation:

Antonio has 15 green marbles and 12 red marbles. The rest of the marbles are blue.

Let the number of blue marbles be x

Total marbles green plus red =

Now, Antonio has a total of 55 marbles.

Equation forms:

We will subtract 27 from 55 to get x.

=

Hence x = 28

Therefore, there are 28 blue marbles.

2 x^2 -3x+p

sum of roots = 3/2

let other root be x

3+ x = 3/2

x= 3/2 - 3 = -3/2

product of roots = p/2

3× -3/2 = p/2

-9 = p

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