Answer:
2 3/5
Step-by-step explanation:
43/10- 17/10
(43 × 10) - (17 × 10) /10 × 10
260/100
260 ÷ 20/100 ÷ 20
2 3/5
Step-by-step explanation:

Answer: 180 i think
Step-by-step explanation: .5*200+.2X=.3(200+X)
100+.2X=60+.3X
.2X-.3X=60-100
-.1X=-40
X=-40/-.1
X=400 OUNCES OF 20% COPPER.
PROOF
.5*200+.2*400=.3(200+400)
100+80=.3*600
100+80=180
180=180
Find the length of each side using the distance formula:, then add all three side length for the perimeter.
Area is found by multiplying the base by the height by 1/2.
See attached picture for the answer: