A distance between home and school is 4.5 miles. on a map it shows the distance to be 9 cm. What is the scale?

If you have the following equation, 2/3x+5/6-x=2-3/4x what would you multiply each term by to get rid of all the fractions

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)