Which expressions are equivalent?

Mathematics

2 answers:

Hunter-Best [27]1 year ago

8 0

3x - 7y and 7y + 3x bc they're interchangeable

lukranit [14]1 year ago

5 0

Answer:

3x -7y = -7y+3x

Step-by-step explanation:

3x is positive and 7y is negative

We can reverse the order

3x -7y = -7y+3x

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If f(x) =4x-2 and g(x) =2x+8, what is h (x) when h (x) =f (x) +g(x)

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2 years ago

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1/3 x 8 in simplest form

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How do we find the breadth of square if perimeter and length is given

madreJ [45]

Answer:

A square has 4 sides of equal length, so if you have been given the length, this is also the breadth.

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2 years ago

The length and width of a rectangle are measured as 55 cm and 49 cm, respectively, with an error in measurement of at most 0.1 c

valentina_108 [34]

Answer:

The maximum error in the calculated area of the rectangle is $10.4 \:cm^2$

Step-by-step explanation:

The area of a rectangle with length $L$ and width $W$ is $A= L\cdot W$ so the differential of <em>A</em> is

$dA=\frac{\partial A}{\partial L} \Delta L+\frac{\partial A}{\partial W} \Delta W$

$\frac{\partial A}{\partial L} = W\\\frac{\partial A}{\partial W}=L$ so

$dA=W\Delta L+L \Delta W$

We know that each error is at most 0.1 cm, we have $|\Delta L|\leq 0.1$ , $|\Delta W|\leq 0.1$ . To find the maximum error in the calculated area of the rectangle we take $\Delta L = 0.1$ , $\Delta W = 0.1$ and $L=55$ , $W=49$ . This gives