Which of the following is an example of an identity? o 22 + 2x + 8 = (x + 2)(x + 4)
2x (2 – 3) + 5x – 15 = (2x + 5) (x – 3)
22 + 9 = (x + 3)
o 23 +8 = (x + 2) (x²+4)

step-by-step explanation:

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the correct answer is a.) bc< mn 5 stars if this you : )

step-by-step explanation:

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west