Simultaneous Equations 1.x-3y+1 = 0
x^2 -3xy + y^2 =11

2. 3^x = 9^(y-1)
x^2 - y^2 = 7

3. 10 + x^2 > x(x-2)

4. (a) 6x - 7 < 2x + 3
(b) 2x^2 - 11x +5 < 0
(c) both 6x - 7 < 2x +3 and 2x^2 - 11x + 5 < 0

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step-by-step explanation:

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

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: