An online retailer charges $6.99 plus 0.55 per pound
to ship electronics purchases. how many pounds is a dvd
player for which the shipping charge is $11.94?

9 lb

Step-by-step explanation:

Set the equation. First, write the expression out:

An online retailer charges $6.99 plus $0.55 per pound.

Note that $6.99 is a one-time charge (the constant), and so it is added on.

$0.55 is connected to the variable of pounds, for you do not know how much pounds there are in all.

Set the equation based on information provided:

Total Cost = Constant + (Cost per pound x Amount of pounds).

Note that:

Total Cost = $11.94

Constant = $6.99

Cost per pound = $0.55

Amount of pounds = x

Plug in the corresponding numbers & variables to the corresponding terms:

11.94 = 6.99 + (0.55x)

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS. First subtract, then divide:

11.94 = 6.99 + 0.55x

11.94 (-6.99) = 6.99 (-6.99) + 0.55x

0.55x = 11.94 - 6.99

0.55x = 4.95

Divide 0.55 from both sides to fully isolate the x:

(0.55x)/0.55 = (4.95)/0.55

x = 4.95/0.55

x = 9

9 lb is the amount of pounds of the DVD player.

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answer: b f g .

step-by-step explanation:

here is me explaining it:

the pizza would be delivered around 5, give or take 15 minutes. this means it could be delivered anywhere from 4: 45 to 5: 15

let's say 5: 00 is equivalent to 0 on a number line and x represents time. 4: 45 would be equal to -15x because we are 15 minutes behind our starting point, 5: 00. 5: 15 would be equal to 15x because we are 15 minutes ahead of your starting point (which means you're late on the pizza delivery! )

absolute value is very confusing. the basic definition is how far you are from your starting point. if we deliver the pizza at 4: 45 (15 minutes before the starting point) we would be -15. this means we are 15 away from our starting point, 5: 00. that's the absolute value. |-15| (absolute value of negative fifteen) is equal to 15. if you did not understand this i suggest rereading this paragraph.

the normal way you would write this scenario would be 4.75 (4 and 3 quarters, or 4: 45. you can also write as a fraction.) is less than x and x is less than 5.25 (5 and 1 quarter or 5: 15). 4.75< x< 5.25 the reason why i am using numbers is because you cannot represent typical time as values on a graph, number line, or in an equation.

another way to write this scenario is with absolute value. we can write this as |x| being less than or equal to .25 (remember, this just means 15 minutes).           |x| ≤ .25.

sorry if the end was confusing. because we are talking about time this whole question is 10x harder. like i said earlier, you cannot represent time as, well, time, in a graph, equation, or number line. i set the values as follows: 1/4 or .25 for 15 minutes, and 1 for 1 hour. this is just a common way to set up graphs involving time.

|x| ≤ .25

i hope this ! : )

tell me if you need more assistance