What is the product of (-a + 3)(a + 4)?

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

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

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.