MathNerd(version2.0)

Since Tyler got 1/5 off his book, it means his books is only 4/5 of the original price.

21.67 * 4/5 = 17.336

so he's only paying $17.34

To fing chicken, one must first BE the chicken

Since Tyler got 1/5 off, it means he's only paying 4/5 of the original price.

12.95 * 4/5 = $10.36

2*2 = fish

4/5 = bear

bear eat fish

4/5 > 2*2

If you're decreasing 15.5 by 6%, you're trying to find 94% of 15.5, which is £14.57

5 cents

R = hours Ryan worked

K = hours Kari worked

R + K = 28

R = K + 4 or R - K = 4

combining the two equations:

2R = 32

R = 16

Ryan worked 16 hours, so Kari worked 12 hours. 

edit: I know your answer was right, but you didn't show all the steps, nor a system of equations. Some teachers can be very picky about showing the work.

G = # of GE brand microwave

K = # of Kenmore brand microwave

System of equations:

95G + 175K = 2270

G + K = 18

Multiply:

95G + 175K = 2270

-95G - 95K = - 1710

Add:

80K = 560

Solve:

K = 7

G + 7 = 18

G = 11

So 11 GE brand were sold and 7 Kenmore brand were sold.

R = hours Ryan worked

K = hours Kari worked

R + K = 28

R = K + 4 or R - K = 4

combining the two equations:

2R = 32

R = 16

Ryan worked 16 hours, so Kari worked 12 hours.