A + b = 147....a = 147 - b
5.85a + 4.40b = 786
5.85(147 - b) + 4.40b = 786
859.95 - 5.85b + 4.40b = 786
-5.85b + 4.40b = 786 - 859.95
- 1.45b = -73.95
b = -73.95 / -1.45
b = 51 <== she used 51 lbs of type B coffee
The perimeter is the sum of all the sides so we can add all the sides and set it equal to 35:
Now we have a quadratic so we can use the quadratic formula to find x=
. Now you can plug that into each x to find each side:-)
Answer: C
i think its c hope i helped you
Step-by-step explanation: