All Questions

291

Help with algebra

Find all solutions to (x + 4)/(x + 5) = (x - 4)/(2x) + (x + 3)/(x + 5).

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Guest Apr 13, 2022

265

Geometric sequence

Consider the geometric series 4 + 20/a + 100/a^2 + .... If the sum is a perfect square, what is the smallest possible value of a where a is a positive integer?

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Guest Apr 13, 2022

249

Arithmetic sequences

What is the positive difference between the 2000th term and the 2006th term of the arithmetic sequence -8, -2, 4,10,...?

qjin27 ●

Guest Apr 13, 2022

254

Sum

Compute 1 - 2 + 3 - 4 +... + 2005 - 2006 + 2007 - 2008 + 2009 - 2010.

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Guest Apr 13, 2022

284

geometry

Let be the circumradius of triangle and read more ..

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Guest Apr 13, 2022

225

System

Find the ordered pair, (s, t) that satisfies the system
(s/2) - 3t = -1,
3t - 2s = 3 + s - t

Vinculum ●

Guest Apr 13, 2022

277

circle geometry

Circle O is tangent to AB at A, and angle ABD = 90 degrees. If AB = 12 and CD = 20, find the radius of the circle.
read more ..

BuilderBoi ●

Guest Apr 13, 2022

310

+32

im stuck on this :((

I run a book club with people, not including myself. Every day, for days, I invite three members in the club to review a book. What is the smallest positive integer so that I can avoid ever having the exact same group read more ..

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catswift Apr 13, 2022

229

help geometry

Let A, B, C be points on circle O such that AB is a diameter, and CO is perpendicular to AB. Let P be a point on OA, and let line CP intersect the circle again at Q. If OP = 20 and PQ = 8, find r^2, where r is the radius of the read more ..

Vinculum ●

Guest Apr 13, 2022

318

For $1 \le n \le 100$, how many integers are there such that $\frac{n}{n+1}$ is a repeating decimal?

I am stuck. Please help me.

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Guest Apr 13, 2022

228

Complex numbers

The equation of the line joining the complex numbers -5+4i and -7+2i can be expressed in the form for some complex numbers a and b. Find the ordered pair (a,b).

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Guest Apr 13, 2022

332

what is a rational numberr?

what is a rational number?

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Guest Apr 13, 2022

309

+37

Prime factors

Are there any numbers that have prime factors between 30 & 140 only? You cannot have a prime factor below 30 and a prime factor higher than 40

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GP72022a Apr 13, 2022

490

In triangle ABC, we have ab=5, bc= 8 and ac=7, as shown below:

In triangle ABC, we have ab=5, bc= 8 and ac=7, as shown below:

Calculate
read more ..

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Guest Apr 13, 2022

370

Consider triangles ABC and DEF such that AB=DE=4 and AC=DF=5, as shown in the picture below:

Consider triangles ABC and DEF such that AB=DE=4 and AC=DF=5, as shown in the picture below:

If angle a is 30deg, read more ..

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Guest Apr 13, 2022

Apr 12, 2022

315

help trig

In right triangle ABC, we have AB = 10, BC = 20, and angle ABC = 90 degrees. If M is on AC such that BM is a median of triangle ABC, then what is cos ABM?

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Guest Apr 12, 2022

310

equation

Solve using power rules:

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Guest Apr 12, 2022

234

Having trouble with this q

Sketch the function using transformations. Include multiple curves or a table to illustrate how you arrived at the final graph.

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Guest Apr 12, 2022

308

This problem is pretty challenging

Find all X such that X⁴=-4

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Guest Apr 12, 2022

343

dilation

A dilation with scale factor -3 maps X to Xprime and Y to Yprime. Given XprimeYprime = 2, find XY

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Guest Apr 12, 2022

279

equation

Solve (x+4)^3 + (x+5)^3 = (x+7)^3 + (x-2)^3

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Guest Apr 12, 2022

282

help counting

In writing the integers from 10 through 99 inclusive, how many times is the digit 0 written?

InhumanCalculator ●

Guest Apr 12, 2022

269

Inequality problem

Solve the inequality 2x - 5 <= x + 12. Give your answer as an interval.

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Guest Apr 12, 2022

292

please helpppp

Find the value of B-A if the graph of Ax+By=3 passes through the point (-7,2) and is parallel to the graph of x+3y=-5.

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Guest Apr 12, 2022

All Questions ⁺⁰236341 Questions

Help with algebra

Geometric sequence

Arithmetic sequences

Sum

geometry

System

circle geometry

im stuck on this :((

help geometry

For $1 \le n \le 100$, how many integers are there such that $\frac{n}{n+1}$ is a repeating decimal?

Complex numbers

what is a rational numberr?

Prime factors

In triangle ABC, we have ab=5, bc= 8 and ac=7, as shown below:

Consider triangles ABC and DEF such that AB=DE=4 and AC=DF=5, as shown in the picture below:

help trig

equation

Having trouble with this q

This problem is pretty challenging

dilation

equation

help counting

Inequality problem

please helpppp

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