Which set of expressions are not equivalent? 3(3a) + a(3 a) and 3 a2 + 9 a 5(3 x) - 4(3 x) and 3 x 4(3 a) - 2(4 a) and 4 a2 4 x( x) + 3(2 x) and 4 x2 + 6 x

1

step-by-step explanation:

you are throwing one dart

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58