Pearl solved a system of equations using substitution. Did she do it correctly? How do you know? If she did not find her error and solve the system correctly. 2x + (-5 - x) = 20 r-5= 20 X-5 + 5 = 20 + 5 x= 25 System: y=-5-X 2x + y = 20 Pearl's Solution: r = 25 y = -30

answerim :

n

step-by-step explanation:

im not sure but my dad knows

(a) common ratio in the given sequence is, 3

(b) push ups will do kendall do on the 20th week

step-by-step explanation:

geometric sequence is a sequence of numbers that follows a pattern were the next term is found by multiplying by a constant called the common ratio(r)

(a)

given the sequence: 6 , 18 , 54 , 162 ,

this sequence is geometric sequence where each term is 3 times the previous term.

therefore,

common ratio(r) = 3.

(b)

a formula for nth term of geometric sequence is given by;

,   where r is the common ratio between the successive terms and is the first term,

to find how many push ups will kendall do on the 20th week.

here. n = 20th term.

in the given sequence first term

then;

simplify:

therefore, push ups will do kendall do on the 20th week

it would be 3 ÷by 6 because the number on each side