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Mathematics

1 answer:

Juli2301 [7.4K]3 years ago

3 0

X = 29

You add the two together and set them equal to 180, then solve

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Missy’s rotation maps point K(17, –12) to K’(12, 17). Which describes the rotation?

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Point K is in the 4th quadrant, then it goes into the first quadrant. So this means the rotation could be 90 degrees counterclockwise or 270 degrees clockwise.

The answer is 90 degrees counterclockwise or 270 degrees clockwise.

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3 years ago

Kari estimated the quotient of -12 1/5 divided by 4 2/5 to be -8. Which best describes her error?

liubo4ka [24]

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Step-by-step explanation:

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The expression (1/50)(sqrt(1/50)+sqrt(2/50)+sqrt(3/50)+...+sqrt(50/50) is a Riemann Sum approximation for

alexira [117]

$\dfrac1{50}\left(\sqrt{\dfrac1{50}}+\sqrt{\dfrac2{50}}+\cdots+\sqrt{\dfrac{50}{50}}\right)=\displaystyle\sum_{n=1}^{50}\sqrt{\dfrac n{50}}\frac1{50}$

describes a sum of the areas of 50 rectangles, each of width $\dfrac1{50}$ , and the $n$ th rectangle has height $\sqrt{\dfrac n{50}}$ .

$\sqrt{\dfrac n{50}}$ ranges from a small positive number to 1, which means the integration interval must be $[0,1]$ . The sum is then the right-endpoint Riemann sum of $\sqrt x$ over the interval with $50$ equally spaced subintervals, so

$\displaystyle\sum_{n=1}^{50}\sqrt{\dfrac n{50}}\frac1{50}\approx\int_0^1\sqrt x\,\mathrm dx$

The sum itself evaluates to roughly 0.676, while the exact value of the integral is $\dfrac23\approx0.667$ .

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3 years ago

For what values of x is x + 2x = 24 true?

sveta [45]

I’m sorry. But none of your choices are correct. The correct answer would be 3 and 4. Further more explaining= 3+ 2 times 4 is 24. 2x= 4. That equals 8 and 3 times 8 is 24

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3 years ago

Which expression is a factor of 21 x2 + 13 x-20

Nesterboy [21]

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(7x−5)(3x+4)

Step-by-step explanation:

I think this is the answer

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3 years ago

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