Answer:
-n^2 - 5n + 24
Step-by-step explanation:
Let the number be n.
Then the sum of that number and 3 is n+3.
The difference of 8 and the number is 8 - n.
Then we get the expression (n + 3)(8 - n).
Performing the indicated multiplication, we get:
8n - n^2 + 24 - 3n, or
-n^2 - 5n + 24
Nothing more can be done, as this is not an equation, but rather an expression.
Answer:
average speed for walking = 4.5 km/h
average speed for cycling = 23.2 km/h
Answer:
take the height times the width times the length and u get the area of the box
9514 1404 393
Answer:
- 160 ft (out from the river)
- 320 ft (parallel to the river)
Step-by-step explanation:
Let x represent the length of fence parallel to the river. Then the dimension of perpendicular to the river will be half the remaining fence: (640-x)/2. The total area will be ...
A = x(640-x)/2
This is the equation of a parabola that opens downward. It has zeros at x=0 and x=640, so its axis of symmetry is x = (0+640)/2 = 320. That is, the peak of the area curve is found when x=320.
The dimensions of the garden with the largest area are 160 ft wide by 320 ft long, where the long side is the river side.
Answer:
Step-by-step explanation:
Area of left rectangle:
Length = 36 ft
Width = 8
Area1 = length * width
= 36 * 8
= 288 square feet
Area of right rectangle:
Length = 15 ft
Width = 22 - 8 = 14 ft
Area2 = 15 * 14
= 210 square feet
Area of the figure = Area1 + area2
= 288 + 210
= 498 square feet