If you're good at bivariate data pleas help m and show full working out ;)

In a test, the mean was 64, with a standard deviation of 8. A student scored 1.5 of the standard deviation more than the average. Calculate the student's mark.

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

To determine the number of deer in a forest a forest ranger tags 280 and releases them back

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.