Answer:
X = 12
4x + 12 = 5x
subtract 4x on each side and you're left with x=12
You will need half of the circle with radius of 15 inches.
Area of semi-circle = (<span>πr^2)/2 = 353.25 x $1.40 = $494.55 </span>
The answer for #4 is C. 21x-82
The expression is 50 + 0.25t.
<h3>How to compute the value?</h3>
It should be noted that from the information, the cell phone costs $50 a month plus $0.25 for each text message (t).
The expression will be:
= 50 + 0.25(t)
= 50 + 0.25t
Therefore, the expression is 50 + 0.25t.
Learn more about expressions on:
brainly.com/question/723406
#SPJ1