Answer:
Hi
Step-by-step explanation:
C = hours Carlos drove, M = hours Maria drove.
52*C+54*M = 217
C = 4,1-M
52*(4,1-M)+54M = 217
213,2-52M+54M = 217
217-213,2 = 54M-52M
3,8 = 2M
M = 1,9
Maria drove 1,9h.
136 pieces? Because 68 is half of it (50%) and 68 times 2 is 136
Answer:
first second sum
5 2 7
7 -3 4
-10 6 -4
second picture
D, C, B, A
Step-by-step explanation: