One morning, Annie stood straight in her yard and cast a 3-foot shadow on the level ground. If the top of Annie's head is 5 feet from the tip of her shadow, how tall is Annie? Answers:
A:3.5 ft
B:5 ft
C:4 ft
D:4.5 ft

there are many solutions.

step-by-step explanation:

step 1: simplify both sides of the equation.

4x+6=4x^2+10x−4

step 2: subtract 4x^2+10x-4 from both sides.

4x+6−(4x^2+10x−4)=4x^2+10x−4−(4x^2+10x−4)

−4x^2−6x+10=0

step 3: factor left side of equation.

−2(2x+5)(x−1)=0

step 4: set factors equal to 0.

x=-5/2 or x=1

21

step-by-step explanation: