Which expressions are equivalent to the one below? check all that apply 81^x
a.(9*9)^x
b.9*9^x
c.9^2*9^x
d.9^2x
e.9*9^2x
f.9^x*9^x

answer: c

step-by-step explanation: because you don't have to draw a point of intersection. couldyou give me brainliest?

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do have an equation or graph or

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