Iwill mark brainliest.

multiply and simplify.

(x + 3)^2

a) 6x + 9

b) x^2 + 9

c) x^2 +15x

d) x^2 + 6x + 9

➷ (x + 3)(x + 3)

= x^2 + 3x + 3x + 9

This can be simplified to x^2 + 6x + 9

The answer is option D

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Answer D)

(x + 3)(x + 3) = x^2 + 3x + 3x + 9

This is then simplified to x^2 + 6x + 9

$649.60

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