The answer to this is d*2/8
The only way to do that is with +7 and -7 .
-28 < 2x - 10 < -10.....add 10 to all sections
-28 + 10 < 2x - 10 + 10 < -10 + 10....simplify
-18 < 2x < 0...divide all sections by 2
-18/2 < 2/2x < 0/2...simplify
-9 < x < 0 <===
The shape formed by the three is a right triangle because the angle formed at Rachael's position is 90°.
The known values are 90°, 55° and 45 ft.
Since the sum of all angles in a triangle is 180 degrees, we can easily solve for the angle formed by Jamie: 180°-90°-55° = 35°.
For the distance between Jamie and Lance (JL): cos 55° = 45/JL
JL = 78.455 feet.
For the distance between Jamie and Rachael (JR): tan 35° = 45/JR
JR = 64.267 feet.
Problem 3.
The opposite of 3 is -3.
2x = -3
x = -3/2
Answer: D.
Problem 4.
Distribute the 3.
3(4x - 9) = 28
12x - 27 = 28
Answer: C.
