Which system has infinitely many solutions? 3x – y = -7
82 + y = 7
A
–2x + 2y = -8
X – y = -11
B
-12.c + 2y = -4
-6x +y = -2
с
- +y=4
x - y = 2
D
HELP ITS FOR AN EXAMM

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?

The coordinates of vortex a’ are (8,4) (-4,2) (4,-,4) the coordinates of vortex b’ are (6,6)(12,-,12)(12,12) the coordinates of vortex c’ are(-2,,12)(4,12)(12,-4)