What language does lihue calel national park get its name from

What is the value of x in the equation 6(x + 1) – 5x = 8 + 2(x – 1)?

What is the slope of the line shown below?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is