The equation x2 – 1x – 90 = 0 has solutions {a, b}. What is a + b? –19 –9 1 10

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Graph the linear function using the slooe and y intercept

Write the equation in logarithmic form e^x=403.429