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True [87]
3 years ago
6

For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you sub

stitute into the first equation? 2x + y = 8
−x − 3y = −12
Mathematics
2 answers:
gladu [14]3 years ago
4 0
-x - 3y = -12
-x = 3y - 12..multiply by -1 to make x positive
x = -3y + 12
so u would sub in -3y + 12 for x in the first equation
Temka [501]3 years ago
3 0

Answer:

x=12-3y


Step-by-step explanation:

Question wants to know WHAT EXPRESSION would you substitute into Equation 1 IF you solve for x in Equation 2.


Let's do some algebra and solve for x in Equation 2:

-x-3y=-12\\-x=-12+3y\\x=\frac{-12+3y}{-1}\\x=12-3y

This is the expression we would substitute into  x  of Equation 1 in order to use substitution method and solve.

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50 is not a factor of 8, so we have to break the recipe down. if 200g of chocolate feeds 8 people, then it's safe to assume that 100g feeds 4 people, and 50g feeds 2 people. 

The closest you get to 50 without exceeding it by a factor of 8 is 6 x 8= 48. You'd be missing the chocolate for two people, all you have to do is add 50 grams of a chocolate bar.

You have to multiply each ingredient by 6 therefore everything is exactly the same, just amplified. 200 x 6 =1200, which means you'd need 1200g of chocolate bars + 50g to make a mousse for 50 people. 

Each chocolate bar has 150g, so now what you do is you get the 1250g and divide it by 150g. This will tell you the amount of chocolate bars you need to complete the recipe for 50 people. The answer is 8.33333, which means Tim will have to buy 9 chocolate bars.
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if staff salaries were 32,000 / month last year and 47,000 /month this year what is the total yearly labor cost increase
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Answer:

100㏑²

Step-by-step explanation;

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The graph of f(x) shown below has the same shape as the graph of g (x) = x^2 but it is shifted to the left 2 units. what is the
mariarad [96]

Answer:

  C.  F(x) = (x+2)²

Step-by-step explanation:

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