At a particular restaurant, each pizza roll has 60 calories and each slider has 300 calories. A combination meal with pizza rolls and sliders has a total of 7 pizza rolls
and sliders altogether and contains 900 calories. Graphically solve a system of
equations in order to determine the number of pizza rolls in the combination meal, 2,
and the number of sliders in the combination meal, y.
Please help, like can someone give me the equations and the coordinates

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