The sale price of a dress is 7/10 of its regular price. The sale price of a dress is $44.80. The equation 7/10r= 44.80 can be used to find the regular price r in dollars of the dress. Determine whether r = 31, r= 52, or r=64 is the solution of the equation, and tell what the solution means.

11

step-by-step explanation:

32.50-7.50=25

225/25=11

okay..i will pick 8!

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