Each course at college x is worth either 3 or 4 credits the members of the swim team are taking a total of 49 courses that are worth a total of 161 credits

x= number of credit courses

y = number of 4 credit courses

x+y = 49

solve for x

x=49-y

3x+4y=161

substitute x=49-y into above equation

3(49-y) +4y=161

distribute

147 -3y +4y=161

combine like terms

147+y=161

subtract 147 from each side

y=14

x=49-y

x=49-14

x=35

they took 35 3 credit courses and 14 4 credit courses

35*3+14*4 = 161  so it checks

subtract 147 from each side

on a coordinate grid, point a is at (−4.0, −2.4) and point b is at (4.0, −2.4). point b is a reflection of point a across the –axis. input either a lowercase x or i think is the right awnser

step-by-step explanation:

it is x equals 3   plese mark me really need it

step-by-step explanation: