Answer:
U'(3,4)
J'(0,4)
B'(4,3)
P'(3,1)
Step-by-step explanation:
Refection over y-axis:
After reflection across y-axis, the sign of the x-coordinate will change.
(x ,y) after reflection will be (-x ,y)
U(-3, 4) → U'(3 ,4)
J(0,4) → J'(0,4)
B(-4,3) → B'(4,3)
P(-3, 1) → P'(3 ,1)
Answer:
B. Reject H0 C.
Step-by-step explanation:
Answer:
8,4
Step-by-step explanation:
A construction crew wants to hoist a heavy
beam so that it is standing up straight. They
tie a rope to the beam, secure the base, and
pull the rope through a pulley to raise one
end of the beam from the ground. When
the beam makes an angle of 40 degrees with the
ground, the top of the beam is 8 ft above
the ground.
Th e construction site has some telephone
wires crossing it. Th e workers are
concerned that the beam may hit the wires.
When the beam makes an angle of 60 degrees with
the ground, the wires are 2 ft above the top
of the beam. Will the beam clear the wires
on its way to standing up straight?
<span>Math - Steve Thursday, April 16, 2015 at 6:22pmwe see that the length of the beam is
8/sin40 = 12.45 ft
At 60 degrees, the top is
12.45sin60 = 10.78 ft high
So, the wire is 12.78 ft up.
Since the beam is only 12.45 ft long, it will not touch the wires.</span>
