What number would you add to both sides of x2 + 7x = 4 to complete the square?
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12.5

Step-by-step explanation:

(7/2) = 3.5

(3.5)^2 = 12.5

hope this !

step-by-step explanation:

d = distance between moon and sun, which in this problem is the hypotenuse of a right triangle.  

the distance y is the side opposite to angle x in the right triangle.   use the definition of the sine function from basic trigonometry.

sin(x) = y/d ⇒

d = y/sin(x)