A geologist drew a scale drawing of a section of a quartz layer she saw in a cliff. The
scale drawing of the layer is 2 cm high and 24 cm long. If the actual layer is 0.15 m
high, what is the area of the actual quartz layer section she saw?

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

(-infinity,infinity)

depends what are you allowed to do ?