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3 years ago

-2(4x-13)- -7=176 plzz hlp it was 10 points I'll make it 20

1 answer:

3 0

The answer is -17.875. To solve it you have to make x by itself.
-2(4x-13)- -7=176
First, you would have to distribute.
-8x+26+7=176
Next, you combine like terms.
-8x+33=176
To get x by itself you next have to get rid of the constant.
-8x=143
Then you get x by itself by dividing the coefficient out.
x=-17.875

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kondor19780726 [428]

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3 years ago

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Jobisdone [24]

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Step-by-step explanation:

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2 years ago

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Fiesta28 [93]

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3 0

3 years ago

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ser-zykov [4K]

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4 0

2 years ago

Show all work and reasoning

Natalija [7]

Split up the interval [2, 5] into $n$ equally spaced subintervals, then consider the value of $f(x)$ at the right endpoint of each subinterval.

The length of the interval is $5-2=3$ , so the length of each subinterval would be $\dfrac3n$ . This means the first rectangle's height would be taken to be $x^2$ when $x=2+\dfrac3n$ , so that the height is $\left(2+\dfrac3n\right)^2$ , and its base would have length $\dfrac{3k}n$ . So the area under $x^2$ over the first subinterval is $\left(2+\dfrac3n\right)^2\dfrac3n$ .

Continuing in this fashion, the area under $x^2$ over the $k$ th subinterval is approximated by $\left(2+\dfrac{3k}n\right)^2\dfrac{3k}n$ , and so the Riemann approximation to the definite integral is

$\displaystyle\sum_{k=1}^n\left(2+\frac{3k}n\right)^2\frac{3k}n$

and its value is given exactly by taking $n\to\infty$ . So the answer is D (and the value of the integral is exactly 39).

8 0

3 years ago