What two numbers multiplied equals -1 but add to 4?

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables