An electrician has $120 to spend on interior light fixtures. the wholesale price for 13-watt low-energy lamp is $4. the price for a high-energy lamp is $5. write an expression for how much the electrician spends for a units of the low-energy lamp and b units of the high-energy lamp. complete the table for the electrician's purchase. assume that all of the $120 is spent

Step-by-step explanation:

the first part of the equation is 120 = ?

low energy lamp: 13 dollars per unit

High Energy Lamp: 14 dollars per unit

So, 13a (a stands for "a units") and 14b ( b stands for "b units) are the respective equation for the given values.

so 13a +14b = 120 dollars

55/i dont know i do it for the points

step-by-step explanation:

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