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1054

help me find the 5-digit number!

Form the greatest possible 5-digit number using the clues:
All five digits are different
None of the five digits are 1
The digit in the ten thousands place is greater than 7
The sum of all five digits is 18 <#> The greatest digit is equal to read more ..

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Guest Feb 23, 2020

551

hard math problem

On the number line, a slow bug S and a fast bug F are moving in the positive direction from the point 0. The speeds of both bugs are constant. Both leave 0 at the same time, and four seconds later F has reached 12 and S has reached 8.
If x is the point read more ..

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Guest Feb 23, 2020

683

AOPS help

What is the smallest positive five-digit integer, with all different digits, that is divisible by each of its non-zero digits? (The number itself may have 0 as a digit.)

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Guest Feb 23, 2020

340

plzzz helppp

A very industrious (but confused) ant is 3 feet up a tree. He decides he can eventually reach the bottom if he follows a schedule. Climb up 1 inch on day ONE, then go down 2 inches per day for two days, then back up 3 inches per day for 3 days, then down read more ..

Guest Feb 23, 2020

Feb 22, 2020

300

Hello

Guest Feb 22, 2020

479

help

Flying against the wind, an airplane travels 6560 kilometers in 8 hours. Flying with the wind, the same plane travels 8260 kilometers in 7 hours. What is the rate of the plane in still air and what is the rate of the wind?

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Guest Feb 22, 2020

371

help

A runner traveled 3 mi in the same time that a cyclist traveled 5 mi. The speed of the cyclist was 2 mph greater than that of the runner. What was the cyclist's speed?

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Guest Feb 22, 2020

512

please help

The total of participants who went on the seventh grade field trip to the national science museum considered of all of the seventh grade students and 7 adult chaperones Two-thirds of the total participants rode a large bus and the rest rode a small bus. read more ..

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Guest Feb 22, 2020

1663

-2

HElp Please

In a sequence of ten terms, each term (starting with the third term) is equal to the sum of the two previous terms. The seventh term is equal to 6. Find the sum of all ten terms.

read more ..

geno3141 ●

bubafinity Feb 22, 2020

349

investing question

An engineer invested a portion of $15,000 in a 7% annual simple interest account and the remainder in a 6.5% annual simple interest government bond. The amount of interest earned for one year was $1020. How much was invested in each account?

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Guest Feb 22, 2020

336

please help

Tickets to the Valentines dance cost three dollars per person or $5 per couple. If $475 worth of tickets were sold in 180 people attended to the dance how many couples were there?

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Guest Feb 22, 2020

588

I am stuck on this.

Hi guys this is my first time using the forums and I need help on 1 question:
Let $a$ and $b$ be the roots of $7x^2 - x - 3 = 0$. Find [(1 + a + a^2 + a^3 + ....)(1 + b + b^2 + b^3 + ....]
I know to start the problem you somehow rewrite read more ..

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Guest Feb 22, 2020

438

HELP!!!!

Let A and B be constants such that the graphs of the lines x + 5y = 7 and 15x + Ay = B are perpendicular and intersect at (-8,3). Enter the ordered pair (A,B).

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Guest Feb 22, 2020

405

If I am 5 feet tall standing 3 feet away from a mirror looking at a tree that I can barely see the top of and the base of the tree is 9 feet

If I am 5 feet tall standing 3 feet away from a mirror looking at a tree that I can barely see the top of and the base of the tree is 9 feet away from the mirror how tall is the tree?

Guest Feb 22, 2020

631

Midpoint hw

I just need help getting started, please. Sorry for the formatting

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Josh1222 Feb 22, 2020

-1

688

+174

Math

Find the number of ways of distributing 4 different balls among 4 identical boxes.

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Forumofweb2.0cal Feb 22, 2020

484

algebra

An animal reserve has 22,000 elk. The population is increasing at a rate of 12% per year how long will it take for the population to reach 88,000

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Guest Feb 22, 2020

393

help

Flying against the wind, an airplane travels 3950 kilometers in 5 hours. Flying with the wind, the same plane travels 3030 kilometers in 3 hours. What is the rate of the plane in still air and what is the rate of the wind?

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Guest Feb 22, 2020

505

help

The 4th term of an arithmetic sequence is 1. The 10th term of the same sequence is -2. Which is an explicit formula for this sequence?

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Guest Feb 22, 2020

375

Help!

A positive divisor d of is chosen uniformly at random. What is the probability that d is a perfect cube?

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Guest Feb 22, 2020

348

Counting Help!

A number is called swappy if it is not a palindrome, but swapping two of its digits produces a six-digit palindrome. For example, the number 813381 is swappy, because we can swap the last two digits to get 813318, which is a palindrome.
How read more ..

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Guest Feb 22, 2020

298

Help with Counting!

How many subsets of the set {1, 2, 3 ... 11} have median 6?

Guest Feb 22, 2020

505

+288

Help Pls!

Let and be real numbers such that the roots of are real. Prove that the roots of are real, for any real number

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madyl Feb 22, 2020

529

help

At Ricardo's Tacos, four tacos and two orders of chips cost the same as two tacos and four orders of chips. If Ricardo's charges $2.00 for a single order of chips, how much does Ricardo's charge for 1 taco?

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Guest Feb 22, 2020

All Questions ⁺⁰231039 Questions

help me find the 5-digit number!

hard math problem

AOPS help

plzzz helppp

Hello

help

help

please help

HElp Please

investing question

please help

I am stuck on this.

HELP!!!!

If I am 5 feet tall standing 3 feet away from a mirror looking at a tree that I can barely see the top of and the base of the tree is 9 feet

Midpoint hw

Math

algebra

help

help

Help!

Counting Help!

Help with Counting!

Help Pls!

help

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