Choose a system of equations with the same solution as the following system:
4x − 2y = 6
2x + y = 5
a.−4x − 2y = 10
2x − 3y = 21
b.4x + 2y = 10
10x + y = 21
c.−4x − 5y = −1
2x − 6y = 10
d.3x + 2y = 6
9x + y = 17

Answer the questions in the attachment. a rescue helicopter is at point a and a rescue boat is at point e. the helicopter pilot spots boats in distress at points d and c,with angles as marked in the diagram. figure abce is a rectangle. the altitude of the rescue helicopter, represented by ae, is 5000 feet.

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Look at attachment. has all info needed. need