Answer:
its 6 7/8
Step-by-step explanation:
This is difficult
Step-by-step explanation:
Using the point on the graph (4, 1) solve for a
1 = a(4-3)² - 1
2 = a
10a + 8b = 230
a + b = (2 + 2 + 13 + 10)...a + b = 27 (this is the number of gifts to buy)
a = 27 - b
10(27 - b) + 8b = 230
270 - 10b + 8b = 230
-10b + 8b = 230 - 270
-2b = -40
b = -40/-2
b = 20 <=== she bought 20 eight dollar gifts
a = 27 - b
a = 27 - 20
a = 7 <=== she bought 7 ten dollar gifts
2 of the them have to seat in the front row and the two others in the back
