Solve the simultaneous equations 2x + 3 = 13 4x +- y = -2

x=5 and y=22

Step-by-step explanation:

2x+3=13

2x+3+−3=13+−3(Add -3 to both sides)

2x=10

= (Divide both sides by 2)

x  = 5

Substitute5forxin4x−y=−2:

4x−y=−2

(4)(5)−y=−2

−y+20=−2(Simplify both sides of the equation)

−y+20+−20=−2+−20(Add -20 to both sides)

−y=−22

=  (Divide both sides by -1)

y=22

5

step-by-step explanation:

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.