Final answer:
Carter has 34 bouncy balls, and Mason has twice that amount. Together, they have a total of 102 bouncy balls.
Step-by-step explanation:
The student is asking how many bouncy balls Carter and Mason have in total. Since Carter has 34 bouncy balls, and Mason has twice as many, Mason has 2 × 34 = 68 bouncy balls.
To find the total number of bouncy balls they have, we simply add Carter's and Mason's bouncy balls together: 34 (Carter's bouncy balls) + 68 (Mason's bouncy balls) = 102 bouncy balls.