Which of the following expressions cannot be factored? Explain. a. 6 + 3x
b. 7x + 3
c. 15x + 10
d. 30x + 40

Which of the following expressions cannot be factored? Explain.

a. 6 + 3x

b. 7x + 3

c. 15x + 10

d. 30x + 40

Step-by-step explanation:

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!