By C
D.
A(-5.5)
8.15
C. 2)
D1-5, 1)
A. A'(-10,10), B'(-6, 10), C'(-6, 7),
D'(-10,6)
OB. A'(-5,0), B'(-1,0), C'(-1, -3).
D'(-5,-4)
C. A'(-10,5), B'(-6, 5), C'(-6,2),
D'(-10,1)
D. A'(-5, 10), B'(-1,10), C'(-1,7),
D'(-5,6)

By what

Step-by-step explanation:

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !