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30 *a^5  b^7  c^6

Step-by-step explanation:

(5a^2b^3c^4) (6a^3b^4c^2)

Multiply like terms

5*6   a^2a^3   b^3b^4    c^4 c^2

When we multiply exponents with the same base, we keep the base the same and add the exponents  (x^y *x^z) = x^(y+z)

30   a^(2+3)   b^(3+4)    c^(4+2)

30 *a^5  b^7  c^6

chicken chicken chicken

step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9