Evaluate the expression when x = –8.

7x + 5

a. 4

b. 51

c. -4

d. –51

(-5,-28)

i graphed to on desmos.

it would open into a square depending on the type of envelope i’m not sure about the second part

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: