10.5x + 3y = 811.5
x + y = 97
y = 97 - x
3y = 291 - 3x
7.5x + 291 = 811.5
7.5x = 811.5 - 291
x = 520.5 / 7.5
x = 69.4
69 were sold at the original price
Basically this is a systems of equations question. We set up two equations, X is hamburgers Y is fries
8x + 5y = 24
6x + 2y = 16.60
then you solve for each to get your answer.
Answer:
Obtuse triangle
Step-by-step explanation:
right triangle:
c² = a² + b²
10² = 3² + 5²
100 = 34 NO!
acute triangle:
c² < a² + b²
10² < 3² + 5²
100 < 34 NO!
Obtuse triangle:
c² > a² + b²
100 > 34 <u>YES</u>