On a nationwide test taken by high school students, the mean score was 46 and the standard deviation was 13. The scores were normally distributed. Complete the following statements.
(a) Approximately ?
of the students scored between 7 and 85.

(b) Approximately 95% of the students scored between and

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system

the answer is a and d

emily solved for a part when she should have solved for the whole. 875,000 should be the numerator of the equivalent ratio. 70 x 12,500 is 875,000. so the answer is 100 x 12,500 which is 1,250,000.