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Musya8 [376]
3 years ago
13

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen

t to y from the second equation is substituted into the first equation.
2x – 7y = 4
3x + y = –17
Mathematics
1 answer:
Leona [35]3 years ago
5 0
Expression of y from second equation:
3x + y = -17
y = -17 - 3x       (1)

Now we substitute this y in first equation:
2x - 7(-17 - 3x) = 4
2x + 119 + 21x = 4
23x = -115
x = -5

now we express value of x in equation (1)
y = -17 - 3*(-5) = -2 
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3 years ago
ITS URGENT PLEASE HELP Which equation represents the line that is parallel to y=3/7x+11 and passes through (-21,42)?
Pepsi [2]

Answer:

y = 3/7x + 51

Step-by-step explanation:

y = 3/7x + 11 is parallel to the line so it means that both of their gradient are same so:

y = mx + c

m= gradient point = (-21 , 42)

= 3/7

now we sub the m and the point into the formula which is y= mx+c because we should find the c first then we can find the equation of the line:

42 = 3/7 (-21) + c

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42 + 9 = c

51 = c

c = 51

now you hv to rewrite again the equation become y= 3/7x + 51

So now your final answer is : y = 3/7x +51

3 0
3 years ago
Yo answer this question and who wants to talk and get into it
Furkat [3]

Answer:

Part A: The 15 in the equations is Allison's allowance while the x is the number of months she gets allowance. The 100 in the equation is Allison's work money from the theater while the y is the number of months she works at the theatre.

Part B: The terms in this equation are 15x and 100y. 15x is her allowance profit and 100y is her work profit. I can tell this because 15 is the amount the makes from allowance and 100 is the amount she makes from work.

Part C: 15x is the term that represents the profit from her allowance.

Step-by-step explanation:

so the amount of allowance she gets is 15 * number of months

and I'm assuming she earns 100 * number of months

to make it more clear it would be better to write this equation as

Profit = 15m + 100m

where m = number of months

4 0
3 years ago
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