The answer is 7.
f(a) = 2a-1, 3f(a) = 3(2a-1) = 15 -> a=2 so f(2a)=f(4)=7
Answer:
2.069x10^3
Step-by-step explanation:
Move the decimal places.
So, -(a-3b) becomes -1(a-3b). Then, this becomes 5a-1a+3b. There is +3b because there is a double negative. So, 5-1=4, so your answer is 4a+3b. Pls brainliest
Answer:
1 minus 1 is 0
Step-by-step explanation:
1-1 equals 0
Its 23.1 one because in 23 minutes they travel three miles