Answer:
Step-by-step explanation:
The point is in the 3rd Quadrant of the Cartesian Plane. Therefore, angle must be between 180° and 270° with respect to the horizontal.
The angle is:
The values of the trigonometrical functions are computed below:
Step-by-step explanation:
13) 4x-22+x+11+10x-4 =180
15x=195
x=13
<P=(10(13)-4)=126
<Q=(4(13)-22)=30
<R=13+11=24
Speed
Riding speed = 9 mph
Driving speed = 27 mph
Time
If x hours is the time taken when riding, (x - 1/3) hours is the time taken when driving.
Distance in both instances is the same, D= Speed * time
Therefore,
9*x = 27(x-1/3)
9x = 27x - 27/2
9x = 27x - 9
(9-27)x = -9
-18x = -9
x = 9/18 = 1/2 hours
Distance, D = 1/2 *9 = 4.5 miles
In one hour the father can wash 1/5 of the car while the remaining 4/5 is done by the son.
to do 1/5 wash & wax, the son requires 1/4 hours (i.e 15 mins)
Therefore, the son requires one hour and 15 minutes to wash and wax the car by himself.
Hope that helps.
Answer:
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Step-by-step explanation: