Answer:
90
60
5
-10
-25
-45
Step-by-step explanation:
Do the biggest number. Then count down. When you get to negative number the smallest negative is the biggest number because it is closer to zero.
If x represents the width of the poster (including borders), the area of the finished poster can be written as
.. a = x*(390/(x -10) +8)
.. = 8x +390 +3900/(x -10)
Then the derivative with respect to x is
.. da/dx = 8 -3900/(x -10)^2
This is zero at the minimum area, where
.. x = √(3900/8) +10 ≈ 32.08 . . . . cm
The height is then
.. 390/(x -10) +8 = 8 +2√78 ≈ 25.66 . . . . cm
The poster with the smallest area is 32.08 cm wide by 25.66 cm tall.
_____
In these "border" problems, the smallest area will have the same overall dimension ratio that the borders have. Here, the poster is 10/8 = 1.25 times as wide as it is high.
Answer:
30,340 all you gotta do is add the 2 numbers together
Step-by-step explanation:
A. parallelogram & Rhombus
B. trapezium
Answer:
5 mph
Step-by-step explanation:
10/2 is 5 miles in one hour.
