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Mathematics 8 Online
rootbeer003:

math

rootbeer003:

1 attachment
Vocaloid:

well, if we want to know how much the attorney charges, we would multiply (hourly rate)*(number of hours) and then add the flat fee, right? so how might we express this as an equation?

rootbeer003:

in y= mx + b form

Vocaloid:

good, so what do you think would be your m and b values for attorney A?

rootbeer003:

y = 150x + 250 y= 150(26) + 250

Vocaloid:

good, so evaluating 150(26) + 250 would give you the fee for attorney A any attempts on B, using the same reasoning?

Vocaloid:

(fee for 26 hours)

rootbeer003:

175x + 150 175(26) +150

Vocaloid:

awesome, so evaluating 175(26) +150 gives you the charge for attorney B so after simplifying both 150(26) + 250 and 175(26) +150, which attorney is the better deal for 26 hours?

rootbeer003:

Attorney A, because its 4150 and attorney b is 4700

Vocaloid:

awesome so for the last part of the question, "how many hours does this attorney (attorney A) become a better deal" do you know how to solve for this?

rootbeer003:

no

Vocaloid:

well, since we have attorney A: y = 150x + 250 attorney B: y = 175x + 150 we want x such that attorney A < attorney B so simply solve 150x + 250 < 175x + 150

Vocaloid:

still there? you can start by subtracting 150x from both sides of the equation. this will move all the x-terms to one side

rootbeer003:

i was starting with dividing 175 from both sides and got confused lol, ill try what u said

rootbeer003:

150x+250 < 175x +150 -150 -150 -150 -150 100 < 25x /25 /25 4< x

Vocaloid:

solution is right but need to be careful when showing your work you have to subtract both 150x and 150 from both sides so 150x+250 < 175x +150 -150x -150 -150x -150 100 < 25x /25 /25 4< x would be a more accurate way to show your work

rootbeer003:

ohh ok

Vocaloid:

but otherwise good so since we got x > 4 we can conclude that attorney A starts being a better deal when x > 4, when there is more than 4 hours of work to be done

Vocaloid:

so to summarize: the equations: attorney A: y = 150x + 250 attorney B: y = 175x + 150 the charge for 26 hours: attorney A = 150(26) + 250 = 4150 attorney B = 175(26) + 150 = 4700 solving for attorney A < attorney B 150x+250 < 175x +150 -150x -150 -150x -150 100 < 25x /25 /25 4< x making attorney A the better deal when the work requires more than 4 hours and that's everything the question asks for

rootbeer003:

Great this helped me understand... im gonna make a new post and new question :)

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