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

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

hope this