Is it 2 times x squared (2x^2?
2 * 6^2
2 * 36
72
200/5=40
He can buy 40 pens!!
Hope this helps!!
Answer: can't add an answer, but for the first all 3 angles add up to 180 in a triangle for the second, plug 5 in and also check if all three add up to 180
Step-by-step explanation: