Which sentence illustrates the commutative property for addition? (1) (a+b)+c=a+(b+c) (2) a(b+c)=ab+ac
(3) a+0=a
(4) a+b=b+a

Daniel expanded the expression as shown below -2(-8x-4y+3/4)=-10x-8y-11/4 what errors did he make? check all that apply

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

(a.s."similarity in right triangles"solve for xa.) 10b.) 20c.) 14.5d.) [tex] 6\sqrt{3} [/tex]