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3 years ago

12

Whats 6x + 7y - 5 when x = 2 and y = 3

2 answers:

choli [55]3 years ago

8 0

Answer:

Well if x = 2 and y = 3 then that would be 28

Step-by-step explanation:

First replace the x with 2 and multiply it with 6 getting 12 and then do the same with 7y and turn the y into 3 multiply it getting 21 then you add that with the 12 we got and get 33 then subtract it by that 5 and finish with 28!

Leya [2.2K]3 years ago

3 0

Answer:

28

Step-by-step explanation:

Plug into equation

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7.5x+20y=900 models how many hours (x) and how many lawns mowed (y) Jon has to work in order to save $900. Give 3 combinations o

Trava [24]

ANSWER

$(1,\:\:44.625)$

$(2,\:\:44.25)$

$(3,\:\:43.875)$

<u>EXPLANATION</u>

We chose a value for $x$ and substitute in to the equation and solve for $y$ .

If Jon works for $x=1$ hour,

Then the equation becomes,

$7.5(1)+20y=900$

We make $y$ the subject

$7.5+20y=900$

$20y=900-7.5$

$20y=892.5$

$y=\frac{892.5}{20}$

$y=44.625$

If Jon works for $x=2$ hours,

Then the equation becomes,

$7.5(2)+20y=900$

We make $y$ the subject

$15+20y=900$

$20y=900-15$

$20y=885$

$y=\frac{885}{20}$

$y=44.25$

If Jon works for $x=3$ hours,

Then the equation becomes,

$7.5(3)+20y=900$

We make $y$ the subject

$22.5+20y=900$

$20y=900-22.5$

$20y=877.5$

$y=\frac{877.5}{20}$

$y=43.875$

Therefore three combinations of hours worked and lawns mowed are

$(1,44.625)$

$(2,44.25)$

$(3,43.875)$

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