What are the question marks?
I got -1
Simplify the expression using the definition of an imaginary number.
Answer:
y= 2x -2
Step-by-step explanation:
........................................

Substract '-3.4x' at LHS nad the RHS of the above expression.

Add '4' on both LHS and RHs of the above expression.
Answer: 7.4
Step-by-step explanation:
3x + 13 = 19
3x = 6
x = 2
Now substitute value of 'x' in the second equation:
2(2) + 1.2(2) + 1
= 4 + 2.4 + 1
= 5 + 2.4
= 7.4
Answer:
7.5
Step-by-step explanation:
divide 15 and 50