The length of CD is 12 units. C'D' is the image of CD under a dilation with a scale factor of k. Which of these are true? Choose all that are correct.

/is used for a fraction 1) if x = 2/3 and y = 3/4, what is the value of (x + y) (x/y) expressed as a common fraction? 2) what is the least positive integer greater than 1 that leaves a remainder of 1 when divided by each of 2, 3, 4, 5, 6, 7, 8, and 9? 3) the ponde family's powerjet pumps 420 gallons of water per hour. at this rate, how many gallons of water will it pump in 45 minutes? 4) kim's insurance company pays 80% of the cost of all prescription medication she purchases in a year beyond the first $250 worth of prescriptions. her prescriptions for this year cost a total of $570. how many dollars of this amounts will kim's insurance company pay?

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )