HELP!! Is –41/2 equivalent to (–4)1/2? Why or why not?

1 answer:

8 0

No, they are not equivalent. The first term, -4 1/2 equals 4 whole units and one half unit. All negative. So it’s like you have someone 4 and 1/2 dollars.

The second term, (-4)1/2 means multiplying -4 times 1/2. Doing the multiplication for this gives you -4/2. Solving the division here is -2. It’s taking away 1/2 dollar 4 times.

I hope this helped. Happy to answer any questions you have.

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8x + 17- 2x -9 =?? ,

levacccp [35]

Answer:

Step-by-step explanation:

So for the first one 8x is similar to -2x so you put them together and get 6x and posiative 17 and -9 are similar so you put those together and get 8 so the first eqaution is 6x+8 and for the second one 7y and 10y are similar also know as like terms so you put those together and get -3y becuase the seven is before the 10y and so the equation is -3y+11

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3 years ago

Evaluate the double integral i=∫∫dxyda where d is the triangular region with vertices (0,0),(4,0),(0,4).

mario62 [17]

$I=\displaystyle\iint_D\mathrm dA=\int_{x=0}^{x=4}\int_{y=0}^{y=4-x}\mathrm dy\,\mathrm dx$
$I=\displaystyle\int_{x=0}^{x=4}(4-x)\,\mathrm dx$
$I=8$

To verify this, we can simply find the area of the triangle using the well-known formula $\dfrac12bh$ , where $b$ and $h$ are the base and height, respectively of the triangular region $D$ . We have $b=h=4$ , so the area is $\dfrac{4^2}2=8$ , as expected.