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3 years ago

9

How do you decide whether substitution is the best method to solve a system in three variables?

1 answer:

Ivan3 years ago

3 0

<span>Select one equation and solve it for one of its variables.
In the other equation, substitute for the variable just solved.
Solve the new equation.
<span>Substitute the value found into any equation involving both variables and solve for the other variable. </span></span>

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How did you find x? pls answer

Mariulka [41]

Answer:

x = 8 degree

Step-by-step explanation:

8x - 4 = 60 degree (being alternate interior angle)

8x = 60 + 4

8x = 64

x = 64/8

x = 8 degree

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Usimov [2.4K]

#21 the answer is does √ 9^2 + 2^2

a^2 + b^2 = c^2

9^2 + 2^2 = c^2

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John buys a $5,000 savings bond with a fixed interest rate of 3% with 10 years to maturity. He also buys two $5,000 zero coupon

Wittaler [7]

The answer to this question would be d

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3 years ago

pav-90 [236]

The equality used is Subtraction property of equality

Option A is correct

Step-by-step explanation:

We need to identify which option best explains or justifies Step 1.

Step 1 is: $-c = ax^2 + bx$

The given equation is: $0 = ax^2 + bx + c$

To get the equation for step 1 we need to subtract c on both sides of equation i.e using subtraction property of equality

$0-c = ax^2 + bx + c-c$

$-c = ax^2 + bx$

So, The equality used is Subtraction property of equality

Option A is correct.

Keywords: Solving Quadratic Equations

Learn more about Solving Quadratic Equations at:

#learnwithBrainly

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3 years ago

Help please this question is confusing

lisabon 2012 [21]

Answer:

C

Step-by-step explanation:

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3 years ago

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