What is the value of the expression a) 12(3+13)= 192
b) 12(3+4+5+...+12+13)= 1,056
c) 12(1+2+3+...+12+13)= 1,092
d) 12(3)•12(13)= 5,616

Hello!

12(3+4+5+...+12+13)= 1,056

Step-by-step explanation:

After evaluating the expression it gave me : 1,056          

Hope this helps!  

y=x+9

?

step-by-step explanation:

answer: 30

step-by-step explanation: its 30 because im a basketball player and stephen curry hits most of his shots so if you put 30 you might make the shot goodluck