Hi! Please help. (Using if-then moves in solving equations) One side of a triangle is 5 units more than a second side.
The third side is 2 times the length of the second side.
The perimeter of the triangle is 15 units.
Write and solve an equation to find the lengths of all three sides on the traingle

This is different from the first one can someone me

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?