Answer:
C
Step-by-step explanation:
Answer: 121
Answer:
31.5 hours studying English
Step-by-step explanation:
2 math hours = 3 english hours
21 math hours = ? english hours
21/2 = 10.5
10.5 * 3 = 31.5
Answer:
4
Step-by-step explanation:
-3-(-7) is the same as -3+7, which is also the same as 7-3, which is equal to 4
-z³ + 5k^6 + z³ -10k^6
(-z³ cancels out with z³)
5k^6 -10k^6
(then subtract)
Answer is -5k^6