Answer:
x = 12
length = 4 cm
width = 20 cm
Step-by-step explanation:
a = lw
Plug in the givens
80 = (x - 8)(x + 8)
Multiply
80 = x^2 - 64
Add 64 to both sides
144 = x^2
Take the square root of both sides
x = ±12
(The negative root is extraneous since the dimensions can not be negative)
x = 12
length = x - 8 = 4 cm
width = x + 8 = 20 cm
A positive 3430. because two negatives that are being multiplied by eachother are automatically positive.
Answer:
L=132.66
36.18=W
Step-by-step explanation:
length=L
width=W
Area=A
A=L×W
L=11/3W
4800=11/3W×W
4800=11/3W²
3/11·4800=11/3W²·3/11
√1309.1=√W²
36.18=W
L=11/3×36.18
L=132.66
All answers are approximated.
The two numbers are 23 and 16 and the method is shown algebraically using simultaneous equations in the photo
