For the first question: The equation would be set up as 30=1/2(12x) Then solve for x. (Or just plug that formula into Desmos)
Answer: x=5
its triangle and 7.3 and 23.7 hope this helps
Make sure you study, and if necessary, do some practice problems. Then, check to make sure you are right, and if not, find out why, and correct your mistakes.
The solution to the expression 
gives (x + 4)/2
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more number and variables.
The solution to the expression gives (x + 4)/2
Find out more on equation at: brainly.com/question/2972832
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