Answer:
5
x
−
1
y
=
5
x
-
1
Interchange the variables.
x
=
5
y
−
1
x
=
5
y
-
1
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y
=
x
5
+
1
5
y
=
x
5
+
1
5
Solve for
y
y
and replace with
f
−
1
(
x
)
f
-
1
(
x
)
.
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f
−
1
(
x
)
=
x
5
+
1
5
Step-by-step explanation:
Answer: 26
Step-by-step explanation:
Let the tens digit=x
and units digit=y
Hence sum x+y=8…………(i)
Number =10x+y
Number formed by reversing the digits =10y+x
(10y+x)=(10x+y)+36 i . e. 9y-9x=36
Or y=x+4…………..(ii)
Adding (i) and (ii) gives 2y=12
Hence y=6
hence from (i)
x=8-y
8–6 = 2
hence Number =26
Answer:
The numbers slowly decrease by 4 so we can determine that the 40th sequence is -70.
Step-by-step explanation:
Answer:
D 2400 ft^2
Step-by-step explanation:
His joumey maps out a right angles triangle with base 80 and height 60.
The required area = 1/2 * 80 * 60
= 2400 ft^2
When you do the multiplication yo get 9 for the top and get 81 for the bottom and that means to divide so when you divide 9 by 81 you get 9 it’s as simple as that.