An electrician charges $75 per hour to wire a new house. In addition, she charges $900 for the wire needed for the job. Which equation represents the total cost, C. of a wiring job that takes the electrician h hours to finish?
A
C = 75h + 900
B
C = (75 + 900) h
С
C + 900 = 75h
D
C + 75h = 900
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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)

answer: 1.06 km per sec

step-by-step explanation:

39.6 m=63.72 km

60 min in an hour so 63.72/60=1.06