The length of a rectangle is 3 m more than double the width, and the area of the rectangle is 35 m2. find the dimension of the rectangle.

A=35m2

L=3+2*W

35m2=L*W

35m2=(3+2W)*W

35=3*W+2*W^2

0=3*W+2*W^2-35

W1=7/2m

W2=-5 (can't be used since it's negative)

L=3+2*W

L=3+2*(7/2)

L=10m

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

the answer is 489

step-by-step explanation: