You have to use exponents before you have to use the paratheses.
8 + 3(7² × 4) - 5 ÷ 2
8 + 3(49 + 4) - 5 ÷ 2
8 + 3(53) - 5 ÷ 2
8 + 159 - 5 ÷ 2
167 + 5 ÷ 2
162 ÷ 2
81
Answer:
<em>102°</em>
Step-by-step explanation:
(3x - 12)° + (2x + 2)° = 180°
5x - 10 = 180 ⇒ x = 38
m∠A = (3x - 12)°
<em>m∠A</em> = (3×38 - 12)° = <em>102°</em>
The slope is -3/2. It’s negative because if you see the line, it’s going down. Therefore the slope is negative. And how you get this number? Just pick a point and another point and do rise over run. And you go 3 down and 2 across because it’s negative. If it was positive it will be 3/2. Which will mean 3 up 2 across.
Usually the easiest way to solve this is by using a calculator. Of course only if your teacher allows you too.