Given JL with J(-5,-1) and L(19,-9), if K lies on JL such that ratio of JK to JL is 7.8. find the coordinates of K

What is the reflection image of (5,-3) across the line y = -x?

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?

What is r i 4.5+10r=-6.5 with work pls