Question

identify the like expressions.
5x , -14x, 3x^2+ 1, x^2, -9x^2, xy, -3xy​

Answer 1

Answer:

5x & -14x, x² & -9x², xy & -3xy (3x² + 1 has no like term)

Explanation:

Like terms consists of same variables with the same value.

Ex: x and x² aren't like because the other x is squared.

     77xyx and 893xyz are like since they have the same varibles with same values.

Hope this helps...

Answer 2

Step-by-step explanation:

For normal incidence on a plane mirror identify which of these statements are true --

(I) Both the angles of incidence and reflection are 0 degree .

(II) Both the angles of incidence and reflection are 90 degree .

(III) The angles that both the incident ray and the reflected ray make with the mirror surface are 0 degree .

(IV) The angles that both the incident ray and the reflected ray make with the mirror surface are 90 degree ..

A) Only (I) is true .

B) Only (II) is true .

C) Both (I) and (III) are true .

D) Both (I) and (IV) are true ✔