How do you use stem and leaf plots?

an example, the key is 2 | 5 = 25

0 | 7
1 | 1 4 8
2 | 5 5 5 6 7 7 9
3 |
4 |

Landon wrote that 3−2.6=4. which statement about his answer is true?

What is the measure of angle x? a.101 b.158 c.44 d.79

Griffin ordered a pair of sneakers online. he had a $22 credit that he applied toward the purchase, and then he used a credit card to pay for the rest of the cost. if the shoes cost $58, how much did griffin charge to his credit card when he bought the sneakers?