Place two addition signs and two subtraction signs in the blanks to
correctly solve the equation.
80
11 2 4 5 8 = 10

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

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.