In the equation 8 + 2k = 4k + 4, use substitution to find the value of k.

k=2

Step-by-step explanation:

8+2k=4k+4

Step 1: Simplify both sides of the equation.

2k+8=4k+4

Step 2: Subtract 4k from both sides.

2k+8−4k=4k+4−4k

−2k+8=4

Step 3: Subtract 8 from both sides.

−2k+8−8=4−8

−2k=−4

Step 4: Divide both sides by -2.

−2k

−2

=

−4

−2

k=2

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225