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blagie [28]
3 years ago
14

4x+3y=13 solve by using substitution method. y=-x/4

Mathematics
1 answer:
Shkiper50 [21]3 years ago
4 0
Subsitute -x/4 for y

4x+3y=13
4x+3(-x/4)=13
4x-3x/4=13
times both sides by 4 because we hate fractions
16x-3x=52
13x=52
divide both sides by 13
x=4

sub back
y=-x/4
y=-4/4
y=-1

(x,y)
(4,-1)


the solution is (4,-1)
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I hope choice must be given so that we can select which equation can be used to find its value.

I am showing the steps for this problem.

Given that, x represents the width of the rectangle and the perimeter of the rectangle is 28 inches.

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Formula to find the perimeter of a rectangle is,

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Hence, we can set up an equation as following.

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8 0
4 years ago
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c^5-49.

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3 years ago
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Answer:

16 ft

Step-by-step explanation:

Based on the situation above, it forms into a right triangle. Therefore we can apply the Pythagorean Theorem. We will use the formula below:

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In the problem above, the ladder acts as the hypotenuse denoted by c. It has a length of 20 ft. While the base denoted by b is 12 ft. Therefore, we need to solve for a. We will derive the formula above.

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a = √( 20² - 12² )

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8 0
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Pretty sure the answer is k
5 0
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??? Help me with my work pls
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Answer:

2. 10 + 5 x 2                    $20

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Hope that helps!

Step-by-step explanation:

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