20% of $50 = $10
30% of $50 = $15
40% of $50 = $20
Multiply 20% by $50
30% by $50
40% by %50
Answer:
-8
Step-by-step explanation:
(x-3y=136) + (18x+3y=288) We collect both processes to make y's disappear
19x=-152
x=-8
Ans: D
differentiate sinx=cosx and differentiate x=1
:)