Kelly works at an electronics store.    she is required to sell at least 12 items each month.    she makes a commission of $100 for each laptop and $80 for each smart phone. kelly wants to make more than $1000 for the month.    let x represent the number of laptops sold and y represents the number of smart phones sold.    determine which system of inequalities represents the situation.

x + y < 12 and 100x + 80y ≤ 1000
x + y ≥12 and 100x + 80y > 1000
x + y > 12 and 100x + 80y ≥ 1000
x + y ≤12 and 100x + 80y < 1000

343t464564435rri76i6u

step-by-step explanation:

because i said it is

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places