He solution to the system of equation below is (? 2, ? 1). 2x ? 3y = ? 1 11x ? 9y = ? 13 when the first equation is multiplied by ? 3, the sum of the two equations is equivalent to 5x = ? 10. which system of equations will also have a solution of (? 2, ? 1)? (a)5x = ? 10 11x ? 9y = ? 13 (b)2x + 9y = ? 1 11x ? 9y = ? 13 (c)? 6x + 9y = ? 1 11x ? 9y = ? 13 (d)? 6x + 3y = ? 1 5x = ? 10

what is the model?

step-by-step explanation:

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:

is the anwser b. (-13)?