Jerry started doing sit-ups every day. The first day he did 12 sit-ups. Every day after that he did 4 more sit-ups than he had done the previous day. Today Jerry did 20 sit-ups. Enter an equation that could be solved to find the number of days Jerry has been doing sit-ups, not counting the first day. sorry im in the middle of an algebra test and im struggling

2a+7+4ahow many terms? how many variables? any like terms? yes noif yes, which ones? what are the coefficients? any constants? yes noif yes, which ones? simplify the expression by combining like terms and constants: how many terms now?

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?