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
Answer:
one hosta=$6
one ornamental grass=$10
Step-by-step explanation:
6 10?
6*6+3*10
36+30
66
12*6+8*10
72+80=152
2.5 kg-750grams=1.75 kilograms
The GCF of 36 and 81 is 9
36/9 = 4 water balloons
81/9 = 9 beads
Katrina can invite 9 friends, with each getting 4 water balloons and 9 beads
