Five times the sum of a number and 6 equals 8.

Algebraic expression = 5(x+6)=8

x = -22/5

Step-by-step explanation:

Let the unknown number be x

Translate into Algebraic expression ;

Solve the equation

ratio is 2 : 9

the answer is three

13.5 : 3

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: