Question

Patty got a robotics kit for her birthday. She is building a laundry robot that can take out herclothes from the dryer and fold them. She has some of it complete, but the robot still needs 3arms and 6 wheels. Patty has saved up $68, which is enough to buy the parts she needs. Shelooks at a robotics catalog to see how much it will cost.CostArms$13Wheels$4How much money is left over after Patty buys the parts?

Answer 1

We know that:

- She has some of it complete, but the robot still needs 3 arms and 6 wheels.

- Patty has saved up $68, which is enough to buy the parts she needs.

- Arms costs $13 and wheels costs $4

We must find how much money is left after making the purchase.

To find it we must subtract the money spent on the purchase from the money saved.

- money spent:

Is the money spent when she buys the arms and the wheels

`\text{ \$}13\cdot3+\text{ \$}4\cdot6=\text{ \$}63`

So, the money spent is equal to $63

- money saved

Is the money Patty has saved.

Patty has saved up $68.

Finally, subtracting the money spent on the purchase from the money saved

`\text{ \$}68-\text{ \$}63=\text{ \$}5`

ANSWER:

After Patty buys the parts, $5 is left.