Which pair of expressions are equivalent? A. 7(2x) and 9x
B. 3x+5x and 15x
C. 4(2x-6) and 8x - 24
D. x + x + x+ x and x^4

The answer is C

Step-by-step explanation:

Think of p.e.m.d.a.s you do parenthesis first so

1. 4(2x-6)

2. 4*2x= 8x and 4*-6= -24

3. 8x-24 is your answer then you check the other side and oh wow its 8x-24

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

the answer is 0.071

good luck! : d