C. 4x + y = 21
4(3) + 9 = 21
12 + 9 = 21
21 = 21
2. 3. 5. are correct
1. and 4. are actually interchanged
Answer:
x = 11/5 or 2 1/5
Step-by-step explanation:
propagate the negative through the bottom equation
-5x = -11
x = 11/5
16 because 5 times 4 = 20 there for you multiply 4 times 4 to get 16
Answer:
please mark my answer brainliest
Step-by-step explanation:
can you tell me a subscript n =sin to the power theta +cosec to the power n theta...and a subscript 1 =2...then prove that a subscript n =2...