Q1 Solve the systems of equation using the elimination method.
x + 19 = 2y
5x + 2y = 1

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is

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