Choose a value for x and then solve to find the corresponding y value that makes that equation true . a) 6x = 7y

b) 5x + 3y = 9

c) y + 5 - 1/3 x = 7

i think the answer is seven, for if i'm being useless °ω°

step-by-step explanation:

30005

yes ok                                            

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

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1