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766

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The sequence a_n satisfies a_1 = 1 and a_n = 3a_{n - 1} + 1 for n > 1. Find a_{1978}.

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Guest Dec 15, 2019

587

help

There are three brothers. Two of them are twins.The age of one brother is cube of the other. Next year the age of one brother would be square of the other. What is the sum of their current ages?

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Guest Dec 15, 2019

602

help

Compute 1/7 + 3/7^2 + 6/7^3 + 10/7^4 + 15/7^5 + ...

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Guest Dec 15, 2019

589

help

Simon has three numbers. The third number is four more than the first number, and the second number is five more than three times the third number. The sum of the three numbers is sixteen. What is the first number?

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Guest Dec 15, 2019

-1

768

+318

Pre Calc entered wrong problem before please help

Please show work :) thannk you
(5 points) Given the function r(t) = 6− 24/ t and the values t = 6,t = 12.
(a) Determine the net change between the given values. read more ..

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mharrigan920 Dec 15, 2019

893

+296

Help on 2 geometry questions

1. The diagram below shows twelve 30-60-90 triangles placed in a circle so that the hypotenuse of each triangle coincides with the longer leg of the next triangle. The fourth and last triangle in this diagram are shaded. The ratio of the perimeters of these read more ..

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EpicWater Dec 15, 2019

-1

818

+318

Pre Calc

Please show work :) thannk you
(5 points) Given the function r(t) = 6− 24 t and the values t = 6,t = 12.
(a) Determine the net change between the given values.
(b) Determine the average rate of change between the values read more ..

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mharrigan920 Dec 15, 2019

2063

help

Syd chooses two different primes, both of which are greater than 10 and multiplies them. The resulting product is less than 500 How many different products could Syd have ended up with?

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Guest Dec 15, 2019

914

I have different geography textbooks and different chemistry textbooks. In how many ways can I line the textbooks on a

I have 7 different geography textbooks and 4 different chemistry textbooks. In how many ways can I line the 11 textbooks on a bookshelf if a chemistry textbook must be in the middle and there must be a geography textbook at each end?

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Guest Dec 15, 2019

814

help

The system of equations
has two solutions and in complex numbers. Find .

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Guest Dec 15, 2019

710

HELP PLZ

is a regular octagon of side 12cm. Find the area in square centimeters of trapezoid . Express your answer in simplest radical form.

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Guest Dec 15, 2019

818

help

Find the smallest positive multiple of nine containing only even digits.

atlas9 ●●

Guest Dec 15, 2019

857

+262

help

i feel like this is supposed to be super easy, but i can't figure it out.. :(
What is the least positive integer n such that n^2 - n is divisible by some but not all integer values of k when 1 ≤ k ≤ n?

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atlas9 Dec 15, 2019

729

help

When 16 is subtracted from a three-digit number, and the resulting difference is divided by 2, the result is a three-digit number whose digits are those of the original number, but in reverse order. The sum of the three digits is 20. Find the read more ..

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Guest Dec 15, 2019

596

help

Solve

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Guest Dec 15, 2019

Dec 14, 2019

552

Please Help!

Suppose f(x) is a polynomial of degree 4 or greater such that f(1)=2, f(2)=3, and f(3)=5.

Find the remainder when f(x) is divided by (x-1)(x-2)(x-3).
read more ..

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Guest Dec 14, 2019

-1

680

@CPhill or @Melody

https://web2.0calc.com/questions/somewhat-simple-math-need-help-quick the other answer was wrong

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Guest Dec 14, 2019

827

Somewhat simple math? Need help quick!

How do I solve this 1/2+(1/2+1/4)+(1/2+1/8)+(1/2+1/16)+(1/2+1/32)+…?

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Guest Dec 14, 2019

914

+239

@Cphill

https://web2.0calc.com/questions/help-asap_75627

the previous answers were incorrect, can you help me

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Rollingblade Dec 14, 2019

785

help quick!!

A wire is cut into two pieces, one of length a and the other of length b. The piece of length a is bent to form an equilateral triangle, and the piece of length b is bent to form a regular hexagon. The triangle and the hexagon have equal read more ..

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Guest Dec 14, 2019

824

+537

More Circle Help

Two perpendicular diameters AB and CD of a circle intersect at the center O. A second circle is tangent to the first circle at B, and intersects AO and CO at P and Q, respectively. If AP = 10 and CQ = 7, then find the radius of the larger circle. read more ..

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MathCuber Dec 14, 2019

800

+537

Circle Help!

Let A, B, C, and D be points on a circle such that AB = 22 and CD = 81. Point P is on segment AB with AP = 12, and Q is on segment CD with CQ = 6. The line through P and Q intersects the circle at X and read more ..

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MathCuber Dec 14, 2019

609

help

For a real number x, find the minimum value of (x + 4)(x + 1)(x - 1)(x - 4).

ElectricPavlov ●

Guest Dec 14, 2019

All Questions ⁺⁰237722 Questions

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Pre Calc entered wrong problem before please help

Help on 2 geometry questions

Pre Calc

help

I have different geography textbooks and different chemistry textbooks. In how many ways can I line the textbooks on a

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HELP PLZ

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help

help

help

Please Help!

@CPhill or @Melody

Somewhat simple math? Need help quick!

@Cphill

help quick!!

More Circle Help

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