All Questions ⁺⁰211723 Questions

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85

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Modular Arithmetic

What is the units digit of $3^{2^{1000}} + 1$? (The 1000th Fermat prime)

Guest Nov 27, 2021

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120

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A bag contains 9 hazelnuts, 10 almonds and 5 walnuts. If 6 are drawn at random, what is the probability all six will be the same nut?

A bag contains 9 hazelnuts, 10 almonds and 5 walnuts. If 6 are drawn at random, what is the probability all six will be the same nut?

Guest Nov 27, 2021

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87

1

Interest

Joseph borrows $10000 from his sister Katie at an annual interest rate of 10%. If the interest is compounded twice a year, how much does he owe after 24 months? Give your answer in dollars.

Guest Nov 27, 2021

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90

1

Number Theory

The Lucas sequence is the sequence 1, 3, 4, 7, 11,... where the first term is 1, the second term is 3 and each term after that is the sum of the previous two terms. What is the remainder when the 100th term of the sequence is divided by 20?

Guest Nov 27, 2021

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105

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Geometry

Lines AB and CD intersect at a point O in such a way that ∠DOB = 5∠COB. What is ∠AOD?

Guest Nov 27, 2021

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118

2

trig problem

In right triangle ABC, angle B is 90 degrees. If tan C = 2. Find cos A. No caculator

Guest Nov 27, 2021

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87

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Counting

How many multiples of 9 are between 100,000 and 100,185?

Guest Nov 27, 2021

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94

1

help probability

Rolling four standard dice, what is the probability that the product of the four results is even and a multiple of 3?

Guest Nov 27, 2021

0

131

3

+99

MATH HELP PLS

Can someone please help me on this math problem

Given FIND read more ..

Jxalskdfjarkfhqwio3r Nov 27, 2021

0

102

2

Polygon problem

In concave equilateral pentagon ABCDE, angle A = angle B = 100 degrees. What is the degree measure of E?

Guest Nov 27, 2021

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126

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Algebra problem

Noah was asked to compute the product of two numbers. He misread the problem and entered the sum of the two numbers instead. Luckily he still got the right answer. One of the two numbers is 6. What is the other number?

Guest Nov 27, 2021

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91

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Probability

A card is chosen at random from a standard deck of 52 cards. What is the probability that it is a King or spade (or both)?

Guest Nov 27, 2021

Nov 26, 2021

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69

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help with Algebra

Let x represent the sum of the first 25 positive odd integers. Let y represent the sum of the next 25 positive even integers. What is the value of y - x?

Guest Nov 26, 2021

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73

0

Counting question

Ten people are sitting around a round table. Three of them are chosen at random to give a presentation. What is the probability that at least two of the three chosen people were sitting in consecutive seats?

Guest Nov 26, 2021

0

135

3

+99

MATH HELP PLS

Can someone please help me on this problem

Jxalskdfjarkfhqwio3r Nov 26, 2021

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104

1

help with system

For what ordered pair (a, b) are there infinite solutions (x, y) to the system
4x+ay=-8,
12x+y=b

Guest Nov 26, 2021

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145

1

NEED HELP!!!

There is only one set of five prime numbers that form an arithmetic sequence with a common difference of 6. What is the sum of those five prime numbers?

Guest Nov 26, 2021

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80

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Graphing

Given that the point (9,7) is on the graph of y=f(x), there is one point that must be on the graph of 2y=2*f(2x)+2. What is the sum of coordinates of that point?

Guest Nov 26, 2021

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106

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Binomial Theorem

When we expand (2x+1/2-1/3)^6, what is the coefficient on the x^4 term?

Guest Nov 26, 2021

0

99

2

if u got 1 dolloar each 3 seconds for 19 min how much would it be?

if u got 1 dolloar each 3 seconds for 19 min how much would it be?

Guest Nov 26, 2021

+14

193

14

+473

help with intermediate algebra

For certain positive integers and the set of complex numbers that satisfy is equivalent to the set of complex numbers that satisfy , where is not divisible by the square of a prime. Find . read more ..

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abcdefghijklmnopqrst Nov 26, 2021

-1

151

2

+176

Algebraic Expression for the Nth Term! So hard!

Write an Algebraic expression for the Nth term in the following two sequences.

a. 4, 6, 10, 18, ... n
read more ..

MathyGoo13 Nov 26, 2021

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103

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Parabola

Find the vertex of the graph of the equation y=-2x^2+18x-15.

Guest Nov 26, 2021

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74

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help

Solve the following trigonometric equation over the given interval.
Determine EXACT solutions. Show all work to earn full marks.
2cos2x + cosx − 1 = 0, xε [0, 2π]

Guest Nov 26, 2021

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88

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Algebra

The roots of x^2 + 8x + 4 are the same as the roots of Ax^2 + x + B . What is A + B?

Guest Nov 26, 2021

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