B.
-2x + 8 = y
3x - y = 22

How do I solve it

answer

x=6, y=-2

explanation

-2x + 8 = y equ 1

3x - y = 22 equ 2

u can use any of the simultaneous equation method

using elimination method

rearrange first from equ 1

-2x+8=y

-y-2x=-8

multiple through by -1

y+2x=8 equ 3

rearrange first from equ 2

3x-y=22

-y+3=22 equ 4

equate 3 and 4, adding them together

y+2x=8 equ 3

-y+3=22 equ 4

0+5x=30

5x=30

x=6equ 5

replace 6 for x in any equation

using equ 3

y+2x=8

y+2(5)=8

y+10=8

y=8-10

y=-2

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation:

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart