Answer:
Hans has done a mistake in the second step.
The correct answer is:
5x^2+13x-6=0
5x^2+15x-2x-6x=0 - 5. -6=-30 -30=15. -2
5x(1+3x)-2x(1+3x)=0
(5x-2x)(1+3x)=0
5-2x=0 1+3x=0
x=5/2 x=-1/3
Answer:The answer is -4
Step-by-step explanation:-4+-5=-9
Answer: The answer could be C because is the image of the rotation by 90 degrees clockwise. I hope its right
C) (-4,-11) because when you substitute both numbers into the equation you end with -11 = -11
Answer:
52.88 degrees
Step-by-step explanation:
To find the angle of elevation, we just need to use the tangent relation of the angle, as this relation is expressed as the division of the opposite side (that is, the height of the tree) by the adjacent side (that is, the length of the shadow), so we have that:
tangent(angle) = 37/28 = 1.3214
angle = arc tangent (1.3214) = 52.88 degrees