For the following system use the second equation to make a substitution for the y in the first equation 2x + y=6 and y=3x+4

(0.4, 5.2)

Step-by-step explanation:

Wherever you see a y in the first equation, put in 3x + 4

2x + 3x + 4 = 6        Combine like terms

5x + 4 = 6                 Subtract 4 from both sides

5x + 4 - 4 = 6 - 4      Combine like terms.

5x = 2                       Divide both sides by 5

5x/5 = 2/5                Do the division

x = 0.4                      

Solve for y

y = 3x + 4

y = 3*0.4 + 4

y = 1.2 + 4

y = 5.2

Solution

(0.4 ,  5.2)  

81 seats

step-by-step explanation:

if you multiply 0.65 times 125 then you get 81.5 seats. well since you can't have half of a seat you have to round down and get 81 seats in the no children zones. that leave 44 seats outside of the no children zone.

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2