please answer this question please
Answers
1)
a) 3x+4x = 7x is a monomial
b) 7y is a monomial
c) 7y+8z is a binomial
d) 3+5y-6p is a trinomial
2) In -8x²-9y-6x , The coefficient of x is -6
3) see the above attachment
4)
(9xy-8x+7y)+(-6x+7xy-6y)
=> (9xy+7xy)+(-8x-6x)+(7y-6y)
=> 16xy+(-14x)+(y)
Therefore, 16xy-14x+y
5) (9xy-3x+4x³)+(-5yx+6x³-7x)
= (9xy-5yx)+(-3x-7x)+(4x³+6x³)
=(9xy-5xy)+(-3x-7x)+(4x³+6x³)
= 4xy+(-10x)+10x³
= 4xy-10x+10x³
6)
c) -4ab and 7ba = 7ab are the like terms
7)
(-5n+3m+10mn)-(8mn-9m+2n)
= -5n+3m+10mn-8mn+9m-2n
= (-5n-2n)+(3m+9m)+(10mn-8mn)
= -7n+12m+2mn
8)(-3xy+4x²)-(3x²-8yx)
= -3xy+4x²-3x²+8yx
= (-3xy+8yx)+(4x²-3x²)
= (-3xy+8xy)+(4x²-3x²)
= 5xy+x²
9)Given that 7(p-9)-8(1-p)
If p = -1 then
= 7(-1-9)-8(1-(-1))
= 7(-10)-8(1+1)
= 7(-10)-8(2)
= -70-16
= -86
10)
Given that 3x(5-y)-2y(6+x)
If x = -2 and y = -3 then
= 3(-2)[5-(-3)] -2(-3)[6+(-2)]
= -6(5+3)+6(6-2)
= -6(8)+6(4)
= -48+24
= -24
Answer:
1)
a) 3x+4x = 7x is a monomial
b) 7y is a monomial
c) 7y+8z is a binomial
d) 3+5y-6p is a trinomial
2) In -8x²-9y-6x , The coefficient of x is -6
3) see the above attachment
4)
(9xy-8x+7y)+(-6x+7xy-6y)
=> (9xy+7xy)+(-8x-6x)+(7y-6y)
=> 16xy+(-14x)+(y)
Therefore, 16xy-14x+y
5) (9xy-3x+4x³)+(-5yx+6x³-7x)
= (9xy-5yx)+(-3x-7x)+(4x³+6x³)
=(9xy-5xy)+(-3x-7x)+(4x³+6x³)
= 4xy+(-10x)+10x³
= 4xy-10x+10x³
6)
c) -4ab and 7ba = 7ab are the like terms
7)
(-5n+3m+10mn)-(8mn-9m+2n)
= -5n+3m+10mn-8mn+9m-2n
= (-5n-2n)+(3m+9m)+(10mn-8mn)
= -7n+12m+2mn
8)(-3xy+4x²)-(3x²-8yx)
= -3xy+4x²-3x²+8yx
= (-3xy+8yx)+(4x²-3x²)
= (-3xy+8xy)+(4x²-3x²)
= 5xy+x²
9)Given that 7(p-9)-8(1-p)
If p = -1 then
= 7(-1-9)-8(1-(-1))
= 7(-10)-8(1+1)
= 7(-10)-8(2)
= -70-16
= -86
10)
Given that 3x(5-y)-2y(6+x)
If x = -2 and y = -3 then
= 3(-2)[5-(-3)] -2(-3)[6+(-2)]
= -6(5+3)+6(6-2)
= -6(8)+6(4)
= -48+24
= -24