2 1 3 Move words to the blanks and equations to the boxes to prove that vertical angles 21 and 3 are congruent. Because linear pairs of angles are and Because angles that are to the same angle are It can be concluded that 21 23. congruent supplementary mzl + m2 = 180° m21 + m23 = 180° m 2 + m23 = 180°

28

step-by-step explanation:

8+8+6+6

mean, 40.6

step-by-step explanation:

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

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870