All Questions ⁺⁰237641 Questions

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481

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help algebra

Express the sum 10 + 11 + 12 + ... + n in terms of n.

Guest Dec 13, 2020

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514

1

please help

1. if 4x = 3, what is 42x-2 ?
2. Suppose that 4^a=5, 5^b = 6, 6^c=7, and 7^d=8. what is a * b * c * d ?
3. suppose that x^y = y^x and y=3/4x. what is x + y?

Guest Dec 13, 2020

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386

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cn you help

The red and the blue semicircles have radii of 2 and 1 respectively and the purple circle is tangent to the red and blue semicircles and the large semicircle. Find the area of the green region.

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Guest Dec 13, 2020

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1017

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christmas problem

One of Santa's elves can make one toy each minute. Every 2 minutes 1 toy falls apart. Every 5 minutes Santa takes 3 toys. If two elves are working in a room that contains 30 toys, than how many toys will there be after an hour, assuming that Santa has just read more ..

Guest Dec 13, 2020

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366

0

HELP

Name two methods used to collect data.
Describe the advantages and disadvantages of each method.

Guest Dec 13, 2020

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537

2

need help

In the diagram, PA = 6, PB = 5, PQ = 27, QD = 7, and QC = 12. FInd the length of the chord when PQ is extended on both sides to the circle.

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Guest Dec 13, 2020

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440

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How am I supposed to do this?

You ask the production team to make some candles for the sale. The team is not sure how many they can produce in your short time frame, so they ask for an acceptable range for how many of each candle they should make.
Use your costs and recommended read more ..

Guest Dec 13, 2020

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502

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algebra

If f(x) = ax+b where a and b are real numbers and if f(f(x)) = 9x + 7 then find a+b .

Guest Dec 13, 2020

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418

1

CPHILL Please Help

In the SuperLottery, three balls are drawn (at random) from ten white balls numbered from 1 to 10, and one SuperBall is drawn (at random) from ten red balls numbered from 11 to 20. When you buy a ticket, you choose three numbers from 1 to 10 and read more ..

Guest Dec 13, 2020

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614

1

Helppp!

What is the number of square meters in the area of a circle with diameter 4 meters? Express your answer in terms of .

Guest Dec 13, 2020

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546

2

how do to this

How many positive four-digit integers n have the property that the three-digit number obtained by removing the leftmost digit is one-fifth of n?

Guest Dec 13, 2020

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389

1

Please Help!

Thanks!
Let $f(x)$ be a quadratic polynomial such that $f(-4) = -22,$ $f(-1)=2$, and $f(2)=-1.$ Let $g(x) = f(x)^{16}.$ Find the sum of the coefficients of the terms in $g(x)$ with even exponents. For example, the sum of the coefficients of the read more ..

Guest Dec 13, 2020

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440

1

help plz

In the SuperLottery, three balls are drawn (at random) from ten white balls numbered from 1 to 10, and one SuperBall is drawn (at random) from ten red balls numbered from 11 to 20. When you buy a ticket, you choose three numbers from 1 to 10 and read more ..

Guest Dec 13, 2020

Dec 12, 2020

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546

1

Help please!

I posted a question at https://web2.0calc.com/questions/find-the-complex-number-that-satisfies
and someone answered me but didn't explain how to do it and I'm pretty sure the answer is wrong too. If someone could help that would be great. Thanks! read more ..

Guest Dec 12, 2020

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778

6

+71

HELP ANYONE!! (Please mods tho)

Dogs in the GoodDog Obedience School win a blue ribbon for learning how to sit, a green ribbon for learning how to roll over, and a white ribbon for learning how to stay. There are $100$ dogs in the school. $62$ have blue ribbons, $55$ have green read more ..

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MathSolverForLYFE Dec 12, 2020

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563

2

number theory

Find the smallest positive integer N such that
N mod 4 = 1
N mod 5 = 2
N mod 7 = 3

Guest Dec 12, 2020

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631

1

Help me ASAP!

A sandbox is 7/9 of the way full of sand. You scoop out 3/7 of the sand which is currently in the box. What fraction of sand (in relation to the entire box) is left in the sandbox?

Guest Dec 12, 2020

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382

0

help

Every day, Earth is bombarded with extraterrestrial molecules. Some of these extraterrestrial molecules include the C3H6O3 molecule that was discovered in 2005 in the Sagittarius B2 molecular cloud located near the center of the Milky Way. In 2010, in Mono read more ..

Guest Dec 12, 2020

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458

1

help

The current terrestrial biomass of Earth contains about 4.5x10^15 of complex carbon compounds. If the average yearly rate of deposition of carbon compounds from meteorites is approximately 6x10^5 , about how long would it take for carbonaceous chondrites read more ..

Guest Dec 12, 2020

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832

2

help quickly please!

is the smallest positive multiple of 14 whose digits are all 1s and 0s. What is the quotient when is divided by 14?

Guest Dec 12, 2020

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956

1

cos(x+60)=2sinx

cos(x+60)=2sinx

Guest Dec 12, 2020

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361

0

need number theory help

When N is divided by 10, the remainder is a. When N is divided by 11, the remainder is b. What is N modulo 110, in terms of a and b?

Guest Dec 12, 2020

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385

1

help please

Altitudes AP and BQ of an acute triangle ABC intersect at point H. If HP=5 while HQ=2, and AH = 4, then calculate BH.

Guest Dec 12, 2020

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536

1

triangle ABC

In triangle ABC, AB = AC = 13 and BC = 10. Let I be the incenter of triangle ABC. Compute lengths AI, BI, and CI.

Guest Dec 12, 2020

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344

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help needed

Let x and y be real numbers such that 2(x^2 + y^2) = x + y + 1. Find the maximum value of x - y.

Guest Dec 12, 2020

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