Select the equation that has no real solution.

12x + 15 = 12x - 15 can not be solved.

We can not find out what x equals.

Step-by-step explanation:

You can solve - 5x - 25 = 5x + 25

x = - 5

You can solve 7x + 21 = 21

x = 0

You can solve 12x + 15 = 3(4x + 5)

x = AllRealNumbers

That leaves 12x + 15 = 12x - 15

This equation can not be solved

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

the correct answer is

c. 4

step-by-step explanation:

the given polynomial is

the degree of the polynomial is the highest exponent which is 4.

the -4 is called the leading coefficient.

this polynomial has only one term so it is a monomial.

the correct answer is option c.