Could someone answer the questions on the picture . i really need

In a mathematical equation, a coefficient is a constant by which a variable is multiplied. consider the following equations: 3 x 2 + 5 x - 3 = 0ax 3 + by 2 = zthe values 3 and 5 in the first equation are coefficients of x , a variable. in the second equation, if a and b are constants, then a is a coefficient of x 3 , and b is a coefficient of y 2 . it is customary to use lower-case, italic letters from the first half of the alphabet to represent constants whose values are not specified numerically. lower-case, italic letters from the second half of the alphabet generally represent variables.in algebra, a constant is a number on its own, or sometimes a letter such as a, b or c to stand for a fixed number. example: in "x + 5 = 9", 5 and 9 are constants