Question

Ariane feeds her kitten k grams of food 2 times in the morning and 2 times in the evening. She feeds her dog d grams of food 1 time in the morning and 1 time in the evening.

Which expressions can we use to describe how many grams of food Ariane feeds her animals per day?

Answer 1

2d+4k and (2k+d)+(2k+d)

Explanation:

This is the correct answer for on Khan

Answer 2

Ariane feeds the kitten twice in the morning and twice in the evening. That's a total of 4 times. If each time she feeds them k grams, she feeds the kitten a total of

`\underbrace{k+k}_{\text{morning}}+\underbrace{k+k}_{\text{evening}} = 4k`

Similarly, she feeds the dog once in the morning and once in the evening. That's a total of two times. If each times she feeds the dog d grams of food, she feeds

`\underbrace{d}_{\text{morning}}+\underbrace{d}_{\text{evening}} = 2d` grams of food to the dog.

So, the total is
`4k+2d` grams of food each day.