The difference of two numbers, a and b, is 21. the difference of 5 times a and two times b is 18. what are the values of a and b? a. 4, 1 b. -19, 40 c. 20, 1 d. 30, 9 e. -8, -29 i will give the brainliest and a like to the right answer.

Its E .  -8,-29

Step-by-step explanation:

we have a system of 2 equations:-

a - b = 21

5a - 2b = 18

Multiply the first equation by - 5:-

-5a + 5b = -105   Add this to the second equation:-

3b = -87

b = -29

So a  - (-29) = 21 ( using the  first equation)

a + 29 = 21

a = 21 - 29 = -8

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2