3 pencils sell for $0.99, How much would 7 pencils cost.

2.31

Step-by-step explanation:

Thisis because when you have o figure the unit rate which is found by doing 0.99/3 or to   remember the formula cost/total number of whatever than you get 0.33   is unit cost for one no multiply that by 7

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

[2, 2.5)

(2.5, 3]

step-by-step explanation:

i think its these two not sure [2, 2.5)

(2.5, 3]