Answer:
2
Step-by-step explanation:
2k+3=7
2k=4
k=2
Answer:
1/2 is the answer
Step-by-step explanation:
Answer:
6
Step-by-step explanation:
Let the 4 people be A, B, C and D. If each of them shakes hands with another person exactly one time then that means
A shakes with B, C and D. So 3 handshakes
B already shakes with A. So B shakes with C and D. 2 handshakes
C already shakes with A and B. So C shakes with D only. 1 handshake.
D already shake hand with all above.
Total handshakes: 3 + 2 + 1 = 6
Answer:

Step-by-step explanation:
x and 52 are supplementary, so they add up to 180°
