A black puppy weighed 5 ounces at birth and grows at a constant rate of 5 ounces per week. A white puppy weighed 10 ounces at birth and grows at a constant rate of 5 ounces per week. Is there a time when they will be the same weight?

Question

Write an equation that represents the weight of the white puppy in ounces, y, after x weeks.
Nice!
Complete the table below with the weight of the white puppy, y, after 3, 5, and 7 weeks. You can solve on paper and then enter your answer on Zearn.
y=10+5x

Weeks (x) Weight in oz (y)
3
5
7

Answer 1

To find the weight of the white puppy after a certain number of weeks, we can use the equation you've provided:

\[ y = 10 + 5x \]

where \(y\) is the weight in ounces and \(x\) is the number of weeks.

Now, we can calculate the weight for the specified weeks:

1. After 3 weeks: \[ y = 10 + 5(3) = 10 + 15 = 25 \text{ ounces} \]

2. After 5 weeks: \[ y = 10 + 5(5) = 10 + 25 = 35 \text{ ounces} \]

3. After 7 weeks: \[ y = 10 + 5(7) = 10 + 35 = 45 \text{ ounces} \]

Now we can complete the table:

| Weeks (x) | Weight in oz (y) | |-----------|------------------| | 3 | 25 | | 5 | 35 | | 7 | 45 |

To summarize:

• The weight of the white puppy after 3 weeks is 25 ounces.
• The weight of the white puppy after 5 weeks is 35 ounces.
• The weight of the white puppy after 7 weeks is 45 ounces.