Member: somebodyIUsedToKnow

8 Questions
8 Answers

100

+56

Proof of the power of a point theorem

Point U is outside of a circle. Points X and Y are on the circle. Line UV is tangent to the circle at point V. Prove that

somebodyIUsedToKnow May 30, 2023

+56

The line y = –11x – 7 is tangent to the parabola y = ax² + bx + 1 at point P. The x-coordinate of P is –2

The line y = –11x – 7 is tangent to the parabola y = ax² + bx + 1 at point P. The x-coordinate of P is –2. Determine the value of a + b without using calculus.
Thank you in advance.

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somebodyIUsedToKnow May 29, 2023

+56

Point U is outside of a circle. Points X and Y are on the circle and are colinear with point P (i.e., the three points are on the same line)

Point U is outside of a circle. Points X and Y are on the circle and are colinear with point P (i.e., the three points are on the same line). Line UV is tangent to the circle at point V. Prove that UV2 = UX * UY.
Thanks in adv read more ..

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somebodyIUsedToKnow May 28, 2023

+56

The line y = –11x – 7 is tangent to the parabola y = ax² + bx + 1 at point P. The x-coordinate of P is –2. Determine the value of a + b.

The line y = –11x – 7 is tangent to the parabola y = ax² + bx + 1 at point P. The x-coordinate of P is –2. Determine the value of a + b.
Thanks in advance

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somebodyIUsedToKnow May 28, 2023

107

+56

Trigonometry problem HELP PLEASE

In a parallelogram ABCD, AB = 54, BC = 78, AC2 — BD2 = 8,168. Find the following.
a. the angles ABCD
b. the diagonals AC and BD
c. the angles between the diagonals AC and BD read more ..

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somebodyIUsedToKnow Apr 28, 2023

+56

Parallelogram problem with trigonometry

In a parallelogram ABCD, AB = 54, BC = 78, AC2 — BD2 = 8,168. Find the following.
- the angles ABCD
- the diagonals AC and BD
- the angles between the diagonals AC and BD

Thank you in advance. read more ..

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somebodyIUsedToKnow Apr 28, 2023

271

+56

Need help with a problem

Samya thinks of a three-digit integer:
It is not a multiple of four. It is greater than 560 but less than 590. It is not a perfect square. The sum of its digits is a prime number What are the possible numbers?

Please help read more ..

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somebodyIUsedToKnow Aug 19, 2022

193

+56

Need Help with a Problem

PROBLEM: The clock on the wall at the Fedex office has an hour hand that's 4 cm long and a minute hand that's 8 cm long. At exactly 2:00, at what rate, in centimeters per minute, is the distance between the tips of the two hands changing?
read more ..

somebodyIUsedToKnow Aug 13, 2022

+56

I think this is wrong because point P is (-2, 15), not (-2, 2). Thank you for your answer though.

somebodyIUsedToKnowMay 29, 2023

+56

I don't think UV=r because U is outside the circle.

somebodyIUsedToKnowMay 28, 2023

+56

Could you tell me why we need ax² + (b+11)x + 8 = 0 to have equal roots at x = 2?

somebodyIUsedToKnowMay 28, 2023

+56

Thank you so much for your thorough answer. Could you tell me how to solve this problem without using calculus?

somebodyIUsedToKnowMay 28, 2023

+56

Thank you for your answers.

Could you explain how you got those answers, please?

somebodyIUsedToKnowApr 28, 2023

+56

I still don't understand how you got 32 for angle ACB. Could you explain it in more detail?

somebodyIUsedToKnowApr 28, 2023

+56

Are there any other ways?

somebodyIUsedToKnowAug 22, 2022

+56

Thanks for your answer. Could you explain how you got your answers, please?

somebodyIUsedToKnowAug 21, 2022

Username	somebodyIUsedToKnow
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