1/2 x + 13 = 9 (x Is Variable)

x= -8

Step-by-step explanation:

1/2x + 13=9

- move 13 to the other side

1/2x= 9-13

-simply 9-13

1/2x= -4

-multiply 2 on both sides

1x=-8

x=-8

x = -8

Step-by-step explanation:

1/2 x + 13 = 9

- Combine all like terms by subtracting 13 from both sides.

1/2x = -4

- Divide 1/2 from both sides of the equation to isolate the variable.

x = -8

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: