PLS HELP FAST Select all expressions that are equivalent to 0.75x + 0.25(x + 12.4) + (x – 2.1)

A. 2x + 1

B. x + 1

C. x + 3.1 + x + 2.1

D. x + 3.1 + x – 2.1

Both    A.)  2x + 1   and  D.) x + 3.1 + x – 2.1

Step-by-step explanation:

0.75x + 0.25(x + 12.4) + (x – 2.1)  

distribute 0.25 in the middle term 0.25 × 12.4 = 3.1

and "multiply by +1" the second parentheses to remove them

0.75x + 0.25x + 3.1 + x – 2.1  

add the decimal coefficients  0.75x + 0.25x = 1.00x (means 1x) so:  = x

x + 3.1 + x - 2.1    This is choice D  an equivalent expression

simplify by combining like terms to get

2x + 1   This is choice A

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .