Question

Alfonso has 435 stamps in his collection. He wants to collect at least

815 stamps. Write and solve an inequality to determine how many

more stamps Alfonso must collect to reach his goal. Let d represent the

number of stamps Alfonso must collect to reach his goal.

435 + d-815; d-380

435 + > 815;d > 380

435 + d 2815;d > 815

435 +0 2 815; d 2380

Answer 1

Inequality:
`435 + d \geq 815`

Solution:
`d \geq 380`

Explanation:

He has 435 stamps in his collections.

He will collect d stamps, and he wants to collect at least 815 stamps, that is, the sum of 435 and d has to be at least 815.

So the inequality is given by:

`435 + d \geq 815`

And the answer is given by:

`d \geq 815 - 435`

`d \geq 380`