Answer:
cos47° = 
Step-by-step explanation:
cos47° = 
=
Let the width be w, then length = 2w - 1
Area = length times width = w(2w - 1) = 21.
Thus, 2w^2 - w = 21 or 2w^2 - w - 21 = 0
Solving the quadratic equation gives that w = 3.5.
Therefore, width is 3.5 ft and length is 2(3.5) - 1 = 6 ft.
<h3><u>The value of x is greater than or equal to -4.</u></h3>
(3x + 17) ≥ 5
Subtract 17 from both sides.
3x ≥ -12
Divide both sides by 3.
x ≥ -4
Eva because 3:2 = 9:6 because when they multiply by 3 on each ratio
26x3=78
78-x=72
x=6
She needs to buy at least 6 more to have enough for 26 students
