Answer:
-45
Step-by-step explanation: just put it thru the calculator
Answer:
She made $21.69 in tips.
Step-by-step explanation:
Take the wage per hour and multiply by the number of hours worked. 11.25x12.25 = 137.81
Then we subtract that number by her final pay. 159.50-137.81= $21.69 in tips
Answer:176 psychology textbooks and 98 Biology textbooks were sold.
Step-by-step explanation:
Let x represent the number of psychology textbooks that were sold.
Let y represent the number of biology textbooks that were sold.
textbook store sold a combined total of 274 psychology and biology textbooks in a week. This means that
x + y = 274 - - - - - - - - - - -1
The number of psychology textbooks sold was 78 more than the number of biology textbooks sold. This means that
x = y + 78
Substituting x = y + 78 into equation 1, it becomes
y + 78 + y = 274
2y = 274 - 78
2y = 196
y = 98
x = y + 78 = 98 + 78
x = 176