Alumbar truck travels 60 miles each way from a sawmill to a lumber camp and then back in 7 hours. if the truck averages 5mph less on the return trip than on the trip to the camp, find its average speed to the camp

13.6 mph

Step-by-step explanation:

The truck travels 60 miles to and back. We know the truck took 7 hours on the journey back of 60 miles. This means it’s average speed over this time was 60/7 = 8.6 miles per hour.

It averages 5mph less on its return trip. This means on the way to the camp it goes 5mph faster so 8.6+5=13.6 mph on its trip to the camp.

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)