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Eduardwww [97]
2 years ago
14

A square has side length of 2x + 9. The perimeter is 68. Find the value of x

Mathematics
1 answer:
Aneli [31]2 years ago
6 0

Answer:

x = 4

Step-by-step explanation:

4(2x+9) = 68

8x+36 = 68

8x = 68 - 36

x = 4

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The area of the postcard is 24 square inches. What is the width b of the message (in inches)?
MAXImum [283]
Area of rectangular post card = length x width
For the given post card: 
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So, substituting in the equation of the area:
24 = 4 x (3+b)
24 = 12 + 4b
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Therefore:
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Which of these systems would be best solved by using the elimination method? (Check all that apply)
liraira [26]

Answer:

option 1 and 4

Step-by-step explanation:

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In the first system, the first equation has -8y while the second one has 8y.

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Reasons it can't be the other options :

In the second system, no variable has the same number before it so no variable can be eliminated unless you multiply the equations by a common multiple. The best method for this system would be graphing

In the third system y is defined by an expression therefore using the substitution method is the most logical approach.

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Step-by-step explanation:

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