Acb radio is rated at 7.5 watts, and actual measurements show that it delivers 6.3 watts to its antenna. what is its efficiency?

The efficiency is 84%.

Step-by-step explanation:

The efficiency is the percentage that it delivers, so it can be solved by a rule of three.

6.3 watts - x

7.5 watts - 1

So the efficiency is 84%.

there are many solutions.

step-by-step explanation:

step 1: simplify both sides of the equation.

4x+6=4x^2+10x−4

step 2: subtract 4x^2+10x-4 from both sides.

4x+6−(4x^2+10x−4)=4x^2+10x−4−(4x^2+10x−4)

−4x^2−6x+10=0

step 3: factor left side of equation.

−2(2x+5)(x−1)=0

step 4: set factors equal to 0.

x=-5/2 or x=1