All Questions ⁺⁰237643 Questions

0

696

1

+4116

Help 36

NotSoSmart May 17, 2018

-1

730

1

+4116

Help 35

NotSoSmart May 17, 2018

-1

706

1

+4116

Help 33

NotSoSmart May 17, 2018

0

1805

1

+239

Let $n$ be the inverse of $2\pmod{17}$.

Let $n$ be the inverse of $2\pmod{17}$.

That is, let $n$ be the integer $0\leq n < 17$ for which $2n \equiv 1 \pmod{17}$. What is $\left(2^n\right)^2 - 2 \pmod{17}$? Express your answer as an integer from $0$ to $16$, inclusive. read more ..

Rollingblade May 17, 2018

0

1244

1

+239

Help ASAP

In the statement below, the two blanks can be filled by positive single-digit numbers in such a way that the statement is always true:

What is the product of the two digits that go in the blanks?

Rollingblade May 17, 2018

0

618

3

Please help :(

Suppose the ratio of Lev's age to Mina's age is 1 : 2 and the ratio of Mina's age to Naomi's age is 3 : 4.
What is the three-way ratio of Lev's age to Mina's age to Naomi's age? Give your answer in simplest form.

Guest May 17, 2018

0

3313

1

What is ∑n=15[5(−2)^n−1] equal to?

What is ∑n=15[5(−2)^n−1] equal to?

Guest May 17, 2018

0

2862

1

+510

What is ∑n=16[4(−5)n−1] equal to?

What is ∑n=16[4(−5)n−1]∑n=16[4(−5)n−1] equal to?

SamJones May 17, 2018

0

1214

1

+510

What is ∑n=18(3n−1) equal to?

What is ∑n=18(3n−1) equal to?

SamJones May 17, 2018

0

655

1

+510

Which explicit rule can be used to determine the number of people participating in the program in the fifth year?

Which explicit rule can be used to determine the number of people participating in the program in the fifth year?

SamJones May 17, 2018

0

637

1

+510

What is the explicit rule that can be used to find the number of homes sold in the nth month of the year?

What is the explicit rule that can be used to find the number of homes sold in the nth month of the year?

SamJones May 17, 2018

-1

690

3

+4116

Help 17,18

NotSoSmart May 17, 2018

+1

2110

1

+1378

Rapid Fire pt2

A circular cylindrical post with a circumference of 4 feet has a string wrapped around it, spiraling from the bottom of the post to the top of the post. The string evenly loops around the post exactly four full times, starting at the bottom edge and finishing read more ..

AnonymousConfusedGuy May 17, 2018

+1

1654

2

+1378

Rapid Fire

A hemisphere-shaped bowl with radius 1 foot is filled full with chocolate. All of the chocolate is then evenly distributed between 27 congruent, smaller hemisphere-shaped molds. What is the radius of each of the smaller molds, in feet?
read more ..

AnonymousConfusedGuy May 17, 2018

+1

1618

3

+1378

2 short questions

1: Joe has exactly enough paint to paint the surface of a cube whose side length is 2. It turns out that this is also exactly enough paint to paint the surface of a sphere. If the volume of this sphere is {Ksqrt6}/{sqrt(pi)}, then what is K?
read more ..

AnonymousConfusedGuy May 17, 2018

0

1093

1

+956

Help

I'm thinking because 4+5 does not equal 10? I'm probably very off

Julius May 17, 2018

+1

3721

1

+309

What is the length of AB¯¯¯¯¯?

What is the length of AB¯¯¯¯¯?
Enter your answer as a decimal in the box. Round only your final answer to the nearest tenth.

read more ..

oscar.a1551 May 17, 2018

0

721

1

+8

Cphill - can you help me please?

On the first day of a measles outbreak at a school, 6 students were identified to have the measles. Each day for the following two weeks, the number of new cases doubled from those identified with the disease the previous day.
How many total students read more ..

cassihasty May 17, 2018

0

505

1

+8

PLEASE HELP MELODY OR CPHILL

On the first day of a measles outbreak at a school, 6 students were identified to have the measles. Each day for the following two weeks, the number of new cases doubled from those identified with the disease the previous day.
How read more ..

cassihasty May 17, 2018

0

1117

3

+561

[Probability] Am I missing something obvious?

Markscheme answer is 21/271 = 0.077 and 40/271 = 0.148, but I get 21/236 = 0.089 and 40/236 = 0.170. Am I being stupid or is the markscheme wrong?

Will85237 May 17, 2018

0

1653

1

In a certain amount of time, a plane traveling at a constant 250 miles per hour traveled 20,000 feet.

In a certain amount of time, a plane traveling at a constant 250 miles per hour traveled 20,000 feet. In this same amount of time, how many feet would a plane traveling at a constant 400 miles per hour travel?

Guest May 17, 2018

+1

842

1

+260

Inverse Functions

qualitystreet May 17, 2018

0

756

1

Solve the side length of the triangle

I have a triangle where angle A is 32° and i know AC side is 8,2 cm and the BC side is 6,7 cm the mission is to solve the last remaining side which would be AB but theres a condition, the triangle area must be less than 10cm^2.

Guest May 17, 2018

0

1058

1

+90

Geometry, Please help.

Sketch the parabola x2 = 4by . The tangent and normal at a point P( 2bt, bt2)
meet the axis
of the parabola in D, E respectively.
(i) Find the coordinates of D and E.
(ii) Show that the focus Q is the midpoint of DE.
(iii) read more ..

Yousif.m May 17, 2018

0

845

1

+90

Posting This for the second time, please help me as much as you can!

1. Two circles with centres N and S and radii a and c (where a < c) respectively touch externally at P. ABC and ADE are common tangents to the two circles. Prove that A, read more ..

Yousif.m May 17, 2018

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