19. Mariella is driving a distance of 100 miles. She drives at a constant rate of 60 miles per hour. The equation that represents the distance she has
left to go is y= 100 – 60x, where x is the number of hours she has
already driven.
a. Graph the equation.
b. State the slope and the y-intercept of the graph from part a.
c. Reason abstractly. Explain what the slope and y-intercept of the
line represent in this item.
= Course 3/PreAlgebra, Unit 2 Equations

2500

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

5: 20

step-by-step explanation:

daren is correct because