All Questions ⁺⁰236361 Questions

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number theory

Let n be a positive integer and let k be the number of positive integers less than 2^n that are invertible modulo 2^b . If , then what is the remainder when k is divided by 13 ?

Guest Apr 26, 2022

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273

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Algebra

Let a and b be the solutions to 5x^2 - 11x + 4 = 0 Find: 1/a^2 + 1/b^2.

Guest Apr 26, 2022

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290

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Please help! Thanks!

In a single-file queue of n people with distinct heights, define a blocker to be someone who is either taller than the person standing immediately behind them, or the last person in the queue. For example, suppose that Ashanti has height a, Blaine has height read more ..

Guest Apr 26, 2022

Apr 25, 2022

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324

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help

A picnic basket was marked up 95% from an original cost of $9.57. Last Friday, Rosanne bought the picnic basket and paid an additional 8% in sales tax. What was her total cost?

Guest Apr 25, 2022

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285

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Coordinates

What is the x- coordinate of the point on the x-axis that is equidistant from points A( -2, 0) and B(0,)?

Guest Apr 25, 2022

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301

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Help so f bad!

Janice bought an antique clock originally priced at $967 but on sale for 5% off. After 1% sales tax, what was the total cost?

Guest Apr 25, 2022

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263

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Coordinates

What is the product of all the coordinates of all the points of intersection of the two circles defined by x^2-2x+y^2-10y+20=0 and x^2-8x+y^2-10y+35=0?

Guest Apr 25, 2022

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276

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Triangle Inequality

A triangle has integer length sides. If two sides of the triangle are 18 and , how many possible lengths are there for the third side?

A triangle has integer length sides. If two sides of the triangle are 18 and , read more ..

Guest Apr 25, 2022

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271

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Need help understanding question

The table shows the probabilities of winning or losing when the team is playing away or is playing at home.

home
away read more ..

Guest Apr 25, 2022

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263

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Parabola

The graph of y=ax^2+bx+c is given below, where a, b, and c are integers. Find a-b+c.

Guest Apr 25, 2022

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283

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help!!!

A store bought a hand-crafted toy chest at a cost of $921.60 and marked it up 115%. Sebastian bought it and paid 2% sales tax. What was his total cost?

Guest Apr 25, 2022

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330

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help me plzzzz

Suppose ten distinct, positive integers have a median of 10. ("Distinct integers" means that no two integers are the same.)
What is the smallest possible average of those ten integers?

Guest Apr 25, 2022

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290

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Probability

i have 8 pennies, 5 quarters, and 3 nickels in my wallet. if i take them out of my wallet one at a time without replacement, what is the probability that the eighth coin is a nickel, and the twelfth is a quarter, and the first coin is a penny? read more ..

Guest Apr 25, 2022

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258

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I suck at statistics so plz help me

(a)Seven friends count the change in their pockets.
They have
What is the average amount of pocket change per person?
read more ..

Guest Apr 25, 2022

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283

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trig question

The sides of a triangle measure 18 inches, 25 inches, and inches. To the nearest degree, what is the measure of the largest angle?

Guest Apr 25, 2022

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280

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Two Joggers

Two runners run for 1 hour at a constant speed on a 400 m track: The first runs at 10 km/h, the second at 7 km/h. The 2 runners start together at the same point. How many times do they cross each other if they are running in opposite directions? Thank you read more ..

Guest Apr 25, 2022

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275

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Base Numbers

For how many ordered pairs (A,B) where A and B are positive integers is $AAA_7+BBB_7+111_7=666_7?$

Guest Apr 25, 2022

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303

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Sphere

Points A, B, and C are on a sphere whose radius is 13. If AB = BC = , what is the longest possible value of AC?

Guest Apr 25, 2022

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184

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need help with a problem

The table shows the probabilities of winning or losing when the team is playing away or is playing at home.

home
away read more ..

Guest Apr 25, 2022

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323

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Help

There were some avocados in 3 boxes, E, F and G. 30% of the number of avocados in Box E was equal to 60% of the number of avocados in Box F. The number of avocados in Box G was 60% of the total number of avocados in Box E and F. After Oscar removed 20% read more ..

Guest Apr 25, 2022

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280

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Pyramid

Find the volume of pyramid ABCD.

Guest Apr 25, 2022

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294

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Right triangle

A certain right triangle with integer side lengths has perimeter 160. What is its area?

Guest Apr 25, 2022

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185

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Double integrals

Change the order of integration and solve :

Guest Apr 25, 2022

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