1. -10=xy+z, solve for x please? 2. h-4/j =k, solve for j please?

Step-by-step explanation:

Solving for x:

Subtracting z from both sides:

Divding both sides by y:

Solving for j:

Subtracting h from both sides:

Multiplying both sides by j,

then dividing both sides by (-h + k):

Simplifying the equation:

the answer is 31.27mph

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