Which expression is equivalent to the given expression? – 2x2 + 8r - 9+ 40 + 722 + 2
OA. 5r2 + 12x - 7
B.
-9.12 – 12.3 + 11
O C.
-5x2 + 4x + 11
OD
–9x2 + 4x - 7

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )

idk

step-by-step explanation: