invalid

6 Questions
6 Answers

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4

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parabola problem

The focus of the parabola x^2=4y is F=(0,1). A line passing through F intersects the parabola at M and N. The line passing through F that is perpendicular to line MN intersects the parabola at a point A in the first quadrant. If angle MAN=90 degrees read more ..

invalid Aug 29, 2024

+2

7

4

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hlp

Marian throws a dart that lands randomly on a dartboard shaped like an isosceles trapezoid with side lengths 12 inches, 12 inches, 12 inches and 24 inches. What is the probability that the dart is closer to the 24-inch side than read more ..

invalid Aug 16, 2024

+1

22

3

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inverses

Which of the following functions have inverses? Note that the domain of each function is also given. A. $a(x) = \sqrt{2 - x},$ $x \in (-\infty,2].$ B. $b(x) = x^3 - x,$ $x \in \mathbb{R}.$ C. $c(x) = x + \frac{1}{x},$ $x \in (0,\infty).$ D. $d(x) = 2x^2 read more ..

invalid Sep 25, 2023

+2

54

2

+39

hard number theory

If $a,b,c$ are positive integers less than $13$ such that\begin{align*} 2ab+bc+ca&\equiv 0\pmod{13}\\ ab+2bc+ca&\equiv 3abc\pmod{13}\\ ab+bc+2ca&\equiv 8abc\pmod {13} \end{align*}then determine the remainder when $a+b+c$ is divided by $13$<read more ..

invalid Sep 9, 2023

+2

57

1

+39

help

Suppose x-3 and y+3 are multiples of 7. What is the smallest positive integer, n, for which x^2+xy+y^2+n is a multiple of 7? By the way it's not 4

invalid Aug 28, 2023

+1

58

4

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HELP!

Simplify $$\frac{1}{\sqrt[3]{2}+\sqrt[3]{16}}$$.

CPhill ●●●●

invalid Aug 12, 2023

+39

0

decimal point

invalidAug 13, 2023

+39

0

g(-4)=3. Thus, x-5=-4, so x=1

invalidAug 12, 2023

+39

0

(2n-1)/((n+1)^2)

invalidJul 26, 2023

+39

+1

3a+4b=5a-6b+24-3a--->4b-2a=-6b+24-3a--->-2a=-10b+24-3a--->a=-10b+24

a=-10b+24

invalidJul 6, 2023

+39

+1

heron's formula--->√42x6x20x16--->√80640--->48√35

invalidJul 6, 2023