Sam earned $154 washing 7 cars. He earned the same amount for washing each car.
Choose all the equations that show reasonable estimates for the amount Sam earned washing each car.
Let's denote the amount Sam earned for washing each car as "x."
The given information states that Sam earned $154 washing 7 cars. So, we can form the equation:
x * 7 = 154
Now, let's analyze the options:
1. x = $21. This equation can be obtained by dividing $154 by 7: 154 / 7 = 22. This suggests that Sam earned $21 for washing each car, which is a reasonable estimate.
2. x = $35. This equation can be obtained by dividing $154 by 4: 154 / 4 = 38.5. However, since it's stated that Sam washed 7 cars, 35 is not a reasonable estimate.
3. x = $22. This equation can be obtained by dividing $154 by 7: 154 / 7 = 22. This suggests that Sam earned $22 for washing each car, which is a reasonable estimate.
Therefore, the equations that show reasonable estimates for the amount Sam earned washing each car are:
- x = $21
- x = $22