Determine whether the relations represent y as a function of x.

Both of those are functions.

Step-by-step explanation:

is a parabola that opens up.

Any upward or downward parabola is a function because they pass the vertical line test.

Subtract 1 on both sides:

Multiply both sides by -1:

So this is a another parabola and it is faced down.  So this is also a function.

wit willl always be a parabola.  

If then it is open up.

If then it is open down.

Upwards and downward parabolas will always be functions.

are also parabolas but these open to the left or right.  These will not be functions because they will not pass the vertical line test.  

answer: 10 turtles

step-by-step explanation: as turtles have four legs so 4.10=40 therefore birds are 4 which sue counted

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 !