47. B 9
48, D 81
49. A 5
50 C 45
Answer:
All are valid
Step-by-step explanation:
Px - 43 = -42x + Q (rearrange)
x = (Q+43) / (P + 42) <----Substitute options for P & Q into this equation to see which combination gives exactly 1 solution for x
A) P=42, Q = 42; x = (42+43) / (42+42) = 1.011 (only 1 solution = valid)
B) P=43, Q = -42; x = (-42+43) / (43+42) = 0.012 (only 1 solution = valid)
C) P=-43, Q = -43; x = (-43+43) / (-43+42) = 0 (only 1 solution = valid)
D) P=42, Q = 43; x = (42+43) / (42+42) = 1.023 (only 1 solution = valid)
The four digits would be seven, because 7 x 5 = 35, and the other digit will be 4.
Answer:
Step-by-step explanation:
Given equation:
Solving for unknown variable
Adding 8 both sides by additive property of equality.
Squaring both sides to remove the square root.
Adding 5 both sides by additive property of equality.
Dividing both sides by 6 to isolate
∴