Degree of the polonomial 7x2yz2+6xy2z3-5x+8y​

degree of the polonomial  : 6

Step-by-step explanation:

Identify the exponents on the variables in each term, and add them together to find the degree of each term.

7x²z²⇒4

6xy²z³⇒6

−5x⇒1

8y⇒1

The largest exponent is the degree of the polynomial.

6

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

4.

step-by-step explanation:

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