Isaac downloaded 7 ringtones. each polyphonic ringtone costs $3.25, and each standard ringtone costs $1.50. if he spends a total of $21 on ringtones, find the number of polyphonic and standard ringtones he downloaded. question 8 options: 1 polyphonic, 6 standard 6 polyphonic, 13 standard 6 polyphonic, 1 standard 8 polyphonic, 1 standard

b

step-by-step explanation:

given

- 2 (3x + 12y - 5 - 17x - 16y + 4 )

simplify the parenthesis by collecting like terms

= - 2 (- 14x - 4y - 1) ← distribute the parenthesis by - 2

= 28x + 8y + 2 → b

3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative

the answer is c

step-by-step explanation: i took a test with this question on it