Simplify each expression. 1) -7 + 3n^4 - 5 + 5n^2 + 5n^4 - 6n^3
A) 8n^4 - 6n^3 + 5n^2 - 12
B) 10n^4 - 6n^3 + 5n^2 - 11
C) 10n^4 - 6n^3 + 5n^2 - 12
D) 10n^4 - 6n^3 + 5n^2 -

2) 4n^2 - 2n^3 - 7n^2 + 6n - 7n^3 + 6n^4
A) 6n^4 - 9n^3 - 8n^2 + 6n
B) 6n^4 - 9n^3 - 8n^2 + 13n
C) 6n^4 - 9n^3 - n^2 + 13n
D) 6n^4 - 9n^3 - 3n^2 + 6n

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

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 !