All Questions ⁺⁰237687 Questions

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137

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counting

When two standard 6-sided dice are rolled, there are 36 possible outcomes for the sum of the two rolls: one sum of 2, two sums of 3, and so on, up to one sum of 12.
Find all possible ways of numbering two 6-sided dice read more ..

Guest Mar 26, 2023

+1

163

1

counting

Need help with probability
My sock drawer contains two red socks, two white socks, and two blue socks. For three days in a row, I pull out two socks out of my sock drawer at random. What is the probability that I get matching read more ..

Guest Mar 26, 2023

+1

169

1

sequence

Help how to do this
Cai writes down the list of positive integers, excluding squares and cubes and all perfect powers. His sequence starts
2, 3, 5, 6, 7, 10, 11, ...
What is the 100th term in Cai's list?

Guest Mar 26, 2023

+1

159

1

counting

A baking club wants to form an executive committee. There are people in the baking club, including mark. In how many ways can the baking club form an executive committee with people?

Guest Mar 26, 2023

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157

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geometry

In triangle PQR, M is the midpoint of PQ. Let X be the point on QR such that PX bisects angle QPR, and let the perpendicular bisector of PQ intersect AX at Y. If PQ = 36, PR = 22, QR = 26, and MY = 8, then find the area read more ..

Guest Mar 26, 2023

+1

167

1

Probability

A member of the junior varsity swim team will be elected as President. Each member is equally likely to be elected. The probability that a sophomore is elected is times the probability that a freshman is elected. Everyone on the junior varsity read more ..

Guest Mar 26, 2023

+1

172

1

turns yellow?

What does it mean if the "x10" in my function turns yellow?

Guest Mar 26, 2023

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147

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Expected value

I need help with these
Suppose we have a bag with 10 slips of paper in it. Eight slips have a 3 on them and the other two have a 5 on them.
(a) What is the expected value of the number shown when we draw a single slip of paper? read more ..

Guest Mar 26, 2023

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146

0

counting

In how many ways can three points be selected from the grid below so that they form a right isosceles triangle?

Guest Mar 26, 2023

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125

1

counting

You are given the 4 x 4 grid below.
(a) Find the number of ways of placing 8 counters in the squares (at most one counter per square), so that each row contains exactly two counters.
(b) Find the number of ways read more ..

Guest Mar 26, 2023

+1

149

0

(2 x (-1.602 x 10^-19 C) x (60 x 10^3 V) / 9.1094 x 10^-31 kg)^0.5

(2 x (-1.602 x 10^-19 C) x (60 x 10^3 V) / 9.1094 x 10^-31 kg)^0.5

Guest Mar 26, 2023

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154

0

7/9 x x = 1/2 -3/8

7/9 x x = 1/2 -3/8

Guest Mar 26, 2023

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169

1

I need help

Guest Mar 26, 2023

+1

167

2

+32

Leap Year

If New Year's Day in a leap year is on a Tuesday, on what day of the week does July 1 fall?
- Thanks

ALittleFroggy Mar 26, 2023

+1

170

1

counting

Miyu is giving out 9 identical chocolates to her 7 friends, including Dhruv. All possible distributions are equally likely. What is the probability that Dhruv gets exactly 2 chocolates?

Guest Mar 26, 2023

Mar 25, 2023

+1

146

0

geometry

Points X, Y, and Z are on the sides QR , PR, and PQ respectively, of right triangle PQR such that PZXY is a square. If PQ=10 and PR=10, then what is the side length of the square?

Guest Mar 25, 2023

+1

163

2

counting

Plz help
A standard six-sided die is rolled 7 times. You are told that among the rolls, there was one 1, two 2's, and three 4's. How many possible sequences of rolls could there have been? (For example, 5, 1, 2, 2, read more ..

Guest Mar 25, 2023

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152

1

Geometry

In tetrahedron ABCO, angle AOB = angle AOC = angle BOC = 90^\circ. A cube is inscribed in the tetrahedron so that one of its vertices is at O, and the opposite vertex lies on face ABC. Let OA = 1, OB = 1, OC = 1. Show that the read more ..

Guest Mar 25, 2023

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148

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Geometry

Plz help with geometry problem
In the diagram below, PQRS is a parallelogram with a perimeter of 26 and an area of 28. What is the perimeter of rectangle OSTQ? Include an explanation of how you solved the probl read more ..

Guest Mar 25, 2023

+2

131

3

+32

Birthday

Two days ago, Robert was 16 years old. Next year, Robert will be 19 years old. What is today's date and when is* Robert's birthday?
*The question originally wrote it as in, but I think "is" is more grammatically correct... read more ..

ALittleFroggy Mar 25, 2023

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