If it takes 7 people a total of 8 days to dig a ditch, how many people would it take to dig the ditch in half a day?

112 people would it take to dig the ditch in half a day.

Step-by-step explanation:

Since, if people do a work in days and the same work is done by people in days,

Then we can write,

Here, = 7, = 8 days, = 1/2 days ( Half of a day),

Thus,

Hence, 112 people would it take to dig the ditch in half a day.

step-by-step explanation:

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)