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3 years ago

Please help!!! ill mark brainliest

Mathematics

1 answer:

Vesnalui [34]3 years ago

6 0

3x - 1 = 3x + 1

subtract 3x from both sides to get (-1 = 1). This is a false statement so it is: CONTRADICTION

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4x - 11 = 7

add 11 to both sides and then divide both sides by 4 to get $(x = \frac{18}{4} = \frac{9}{2})$ . This statement is true only when x = $\frac{9}{2}$ so it is: CONDITIONAL

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2 - 8x = 2 - 8x

add 8x to both sides to get (2 = 2). This is a true statement so it is: IDENTITY

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x + 1 = -x + 4

add x to both sides, subtract 1 from both sides, and divide both sides by 2 to get $(x = \frac{3}{2} )$ . This statement is true only when x = $\frac{3}{2}$ so it is: CONDITIONAL

Answer: B, A, C, A

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Answer:

There is no minimum cost for the fencing that can satisfy these conditions.

as the equation obtained for this problem is y = $\frac{7x}{x-6}$ .

Step-by-step explanation:

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and breath of the rectangular rose garden be y

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and cost of fencing a foot for a road side = $8

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xy - 6y = 7x

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we can check that this function has no minimum value.

as we increase x (starting any x > 6 to make y positive) to make y minimal, y will decrease but the product xy will increase.

So, there is not a minimum cost for fencing that can satisfy these conditions.

8 0

3 years ago

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Two cars are traveling on two different routes, one 43 miles longer than the other. The car traveling on the longer route travel

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Answer:

x1 = 275 miles (shorter)

x2 = 318 miles (longer)

Step-by-step explanation:

Let

x1 = be the shorter route

v1 = speed of the car in the shorter route

t1 = time it took to cover shorter route

x2 = the longer route

v2 = speed of the car in the longer route

t2 = time it took to cover longer route

x1 + 43 = x2 (1)

v2 = v1 -2 (2)

v2 = x2/t2 = x2/6

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The system of equations results

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Solving this system of equations, we find that

x1 = 275 miles

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