7(x + 1) = 21
7x + 7 = 21
7x = 14
x = 2
Let the frequency be 'f' and wavelength be 'w'

, 
w= 100 m and f = 3,000 kilohertz
Plug in the above values to find k
3000 =
To find k, multiply both side by 100
3000(100) = k
k = 300,000
So equation becomes,
w= ? f = 500 kilohertz
500 =
w =
w = 600 m
Answer:
50 years
Step-by-step explanation:
First convert millimeters to centimeters. 2 millimeters is equivalent to 0.2 centimeters. Then divide 10 by 0.2. Answer should be 50
2/3 x=10
Multiply 3*(2/3 x)=3*10
2x=30
x=15
A is the answer
Answer:
line
Step-by-step explanation: