Which algebraic expression would NOT be equivalent if the number and the variable were reversed? A. N+8 B. M−5 C. K×8 D. 4+x

B)  M-5

Step-by-step explanation:

the commutative property does not apply to subtraction or division, only addition and multiplication

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i