Answer:
80 m^2
Step-by-step explanation:
The given information lets you write two equations involving length (x) and width (y).
- 2(x +y) = 36 . . . . the perimeter is 36 m
- (x+1)(y+2) -xy = 30 . . . . increasing the length and width increases area
The second of these equations simplifies to another linear equation, giving a system of linear equations easily solved.
xy +y +2x + 2 -xy = 30
2x +y = 28 . . . . . . . subtract 2
Dividing the first equation by 2 gives
x +y = 18
and subtracting this from the above equation gives ...
(2x +y) -(x +y) = 28 -18
x = 10
Then
y = 18 -10 = 8
The area of the original rectangle is xy = 10·8 = 80 m^2.
Q ////////////////////////////
Answer:
ldk Sry
Step-by-step explanation:
Answer:
sin (20) = - 2
/ 7
Step-by-step explanation:
1- Find the trigonometric values
Hope this helps :)
Answer:
156.5375 cm
Step-by-step explanation:
The function used to estimate the height is F(x)
F(x) = 2.75x + 71.48
The humerus is xcm long. When x = 30.93cm, we put x = 30.93 into the function F(x)
F(30.93) = 2.75(30.93) + 71.48
= 85.0575 + 71.48
= 156.5375 cm(4 decimal places)