Preston has spent 7hrs of the required 13hrs he needs for ALEKS. What percentage of time does he have left?

The system of equations graphed below has how many solutions?

What expression is equivalent to 42x-56y

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean