Is the expression (3x) · x + 4 linear?

no

Step-by-step explanation:

the (3x)(x) will simplify to 3x^2, and when the leading coefficient (the coefficient with the largest exponent) has an exponent of 2 or greater, then it is not linear, as a linear expression must have a leading coefficient with an exponent of 1.

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

may i see the picture? it would a lot, xox