add the 2 equations together
x+y =9
x-y =7
----------
2x = 16
divide by 2
x=8
x+y =9
substitute in x=8
8+y =9
subtract 8 from each side
y =1
(8,1)
Answer:
l = 5 cm
w = 8 cm
h = 3 cm
d = 9.89949 cm
S = 158 cm2
V = 120 cm<span>3
</span>l = length
w = width
h = height
d = diagonal
<span>S = surface area </span>
<span>V = volume</span>
Answer:
wow
Step-by-step explanation: