option D
rent = 25b + 10
where b is hours for boat rented
85 = 25b + 10
25 b = 75
b = 75/25 = 3
<span> <span>The perimeter of a rectangle is 102 cm. If the length is 15 cm less than twice the width</span></span>
The sum of all three angles in any triangle is always 180 degrees. So in obtuse triangle there is only one obtuse angle (more than 90 degrees). If we have for example an obtuse angle of 91 degrees, then two other angles have to fit in 89 degrees which makes it impossible for any of them to be obtuse.
Unit rate = total buttons/ total controllers
Unit rate = 26/2 = 13
Unit rate: 13 buttons per controller
