Solve 2x2 + 3x – 7 = x2 + 5x + 39 for x.

a. x=-6 + or - the square root of 82
b. x=-6 + or - 2 with the square root of 17
c. x=1 +or - the square root of 33
d. x= 1 + or - the square root of 47

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,

y < -3

step-by-step explanation:

-3y - 2 > 7

-3y -2 + 2 > 7+2

-3y > 9

-3y/-3 < 9/-3   (change the inequality sign when multiplying or dividing by a negative number)

y < -3