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Genrish500 [490]
3 years ago
11

Solve each system by substitution. -5x + 3y = 3 and -4x + y = 1

Mathematics
1 answer:
taurus [48]3 years ago
5 0

\left\{\begin{array}{ccc}-5x+3y=3\\-4x+y=1&|\text{add 4x to both sides}\end{array}\right\\\\\left\{\begin{array}{ccc}-5x+3y=3\\y=4x+1&(*)\end{array}\right\\\\\text{Substitute }\ (*)\ \text{to the first equation}\\\\-5x+3(4x+1)=3\qquad\text{use distributive property}\\\\-5x+(3)(4x)+(3)(1)=3\\\\-5x+12x+3=3\qquad\text{subtract 3 from both sides}\\\\7x=0\qquad\text{divide both sides by (-5)}\\\\\boxed{x=0}\\\\\text{Substitute the value of x to}\ (*):\\\\y=4(0)+1\\y=0+1\\\boxed{y=1}\\\\Answer:\ x=0\ and\ y=1.

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Answer:

It would be the first answer.

Step-by-step explanation:

y=-2x^2+4x-2

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y=-2(1)-4-2

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y=-6-2

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4 0
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Let x1 = 12, y1 = 15, and y2 = 3. Let y vary inversely with x. Find x2.
vladimir1956 [14]

Answer:

x2 = 60

Step-by-step explanation:

If the variables x and y are inversely proportional, the product x * y is a constant.

So using x1 and y1 we can find the value of this constant:

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12 * 15 = k

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Now, we can use the same constant to find x2:

x2 * y2 = k

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padilas [110]
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5 0
3 years ago
Read 2 more answers
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lapo4ka [179]

Answer:

The answer is below

Step-by-step explanation:

The profit equation is given by:

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The maximum profit is the maximum profit that can be gotten from selling t trailers. The maximum profit is at point p'(t) = 0. Hence:

p'(t) = -75t² + 1250t - 2500

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t = 2.3 and t = 14.3

Therefore t = 3 trailers and t = 15 trailers

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gladu [14]

Answer:

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3 years ago
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