Answer:
Did you ever get the answer?
Step-by-step explanation:
3.5=.12x
3.5*.12 you multiply .12 and 3.5 because each ounce is equal to 12 cents
.42 is how much she spent on rice
16² = 18² + 19² - 2(18)(19)cos(z)
256 = 324 + 361 - (684)cos(z)
256 = 685 - (684)cos(z)
-429 = -684cos(z)
cos(z) = -429/-684
z = cos⁻¹ (0.627)
z = cos⁻¹ (cos 51) [ Cos 51 = 0.627 ]
z = 51
In short, Your Answer would be: 51
Hope this helps!
