Well you already know your side lengths, so you use this formula S=1/2(A+B+C). For A put in one of your side lengths, for B put one of your side lengths, and for C put one of your side lengths. After you do that solve. But your not done. Once you find out what S equals by doing the formula I just showed you, you have to do another formula which is A= S(S-A)(S-B)(S-C). Once again plug in your side lengths for A,B, and C but then plug in your S value. (Remember you already found your S value by doing the first formula I showed you). Then do the math and then you will find your answer.
Answer:

Step-by -step explanation:
Solving inequalities is similar to solving equations.

Subtract 10 from both sides.

Divide by 5 from both sides to isolate the x.

12 divided by 0.12 is 100
Answer:
-4 and 3
Step-by-step explanation:
-4+3 would equal -1.
Then, -4*3 would be -12.
(alternate interior angles theorem)
(alternate segment theorem)
(angles in a triangle add to 180 degrees)