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2 years ago

13

How do you solve a system of equations using the substitution

2 answers:

alexira [117]2 years ago

4 0

Step-by-step explanation:

Step 1: Solve one of the equations for one of the variables. Let's solve the first equation for y: ...

Step 2: Substitute that equation into the other equation, and solve for x. ...

Step 3: Substitute x = 4 x = 4 x=4 into one of the original equations

larisa86 [58]2 years ago

3 0

When you have a system of equations you have to plug numbers until you have an x,y, you have to make the equation simple, you might start with something like the highlighted equation in the picture and you have to change it to x+(random number)= y the random number is the number you have to find, and plug until you find an equation that has an answer.

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beks73 [17]

Answer:

I think the answer is A

Step-by-step explanation:

First you would need to subtract 21 and 6, and then divide the difference of that by 3

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3 years ago

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geniusboy [140]

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3 years ago

Question 1 Multiple Choice Worth 1 points)<br> (01.05 LC)<br> Solve for x: -7 < X -1 <8

devlian [24]

Answer:

-6 < x <9

Step-by-step explanation:

-7 < X -1 <8

Add 1 to all sides

-7+1 < X -1+1 <8+1

-6 < x <9

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3 years ago

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Gnoma [55]

Answer:

45000

Step-by-step explanation:

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3 years ago

WidgCo is a company that produces and sells widgets. Let p denote the price per widget (measured in dollars), and let x be the m

Alecsey [184]

Answer:

The answer to this question can be defined as follows:

i) $\bold{p(x)= -5x^2+ 217x- 1,401} \\$

ii) x=22 units

iii) Maximum profit: 953.45

Step-by-step explanation:

Given value:

p(x) = 211 − 5x \\

C(x) = 1,401 + 16x

The formula for calculating the profit function value:

$\to \bold{P(x)= xp(x) - C(x)}$

$= x(211-5x)- 1,401 + 16x\\\\= 211x -5x^2-1,401+16x\\\\= -5x^2+ 217x- 1,401 \\$

The formula for calculating the value for maximum profit:

$p'(x) = - 10x + 217 =0$

$217= 10x\\\\x= \frac{217}{10}\\\\x= 21.7$

So, the production level is 22 units

Maximum profit:

$\to p(21.7)= - 5 (21.7)^2+217 (21.7) -1,401\\\\$

$=-5 (470.89) +217 (21.7) -1,401\\\\=-2354.45+ 4708.9-1,401\\\\= 953.45$

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3 years ago