All Questions ⁺⁰232862 Questions

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359

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hlp plz

How many isosceles triangles with whole-number length sides have a perimeter of 30 units?

Guest Jul 6, 2021

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380

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geometry

Suppose regular polygon has an exterior angle that measures 18 degrees. How many sides does this polygon have?

Guest Jul 6, 2021

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200

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help geometry

Let Y, X, and W be three consecutive vertices of a regular 18-gon. A regular heptagon is constructed on Line XY, with a vertex Z next to X. Find angle YXW, in degrees.

Guest Jul 6, 2021

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340

1

help with cone

A circle has a radius of 25. A circular sector, with an angle of 320 degrees at the center, is cut from the circle, and then rolled to form a cone. Find the volume of the cone.

Guest Jul 6, 2021

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306

1

geometric sequence

If b is positive, what is the value of b in the geometric sequence 16, a, 18, b?

Guest Jul 6, 2021

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357

1

quick need help pls

Seven-digit telephone numbers are not allowed to begin with 0 or .1
I can only remember a seven-digit telephone number if the first three digits (the "prefix") are equal to the next three digits or the last three digits. For example, I can remember read more ..

Guest Jul 6, 2021

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332

1

halp

Abigail is thinking of a positive integer m. She supplies the following four clues regarding her number.

(a) If m > 20 then m is divisible by 7
(b) If m < 40 then m is 1 less than a multiple of 3 read more ..

Guest Jul 6, 2021

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263

2

help

To confirm the fact that 11887 is prime, one needs to check if it is divisible by each of 2, 3, 5, 7,.... What should be the four greatest primes in this list?

Guest Jul 6, 2021

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316

1

help and explain :)

Let x be the smallest positive integer such that 1584 * x is a perfect cube, and let y be the smallest positive integer such that xy is a multiple of 1584. Compute y

Guest Jul 6, 2021

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214

0

Graphing question

Let f(x) = ((x - 9)^2 - 3)/2.

The equation y=f(x) is graphed, and the x and y intercepts of the graph are connected to form a polygon. What is the area of that polygon?

Guest Jul 6, 2021

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216

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coordinates

Let A = (6,2), and let B be the reflection of A over the line y = 2x + 5 . Find the coordinates of B.

Guest Jul 6, 2021

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328

1

help geometry

Point D is on side AC of triangel ABC such that angle ADB = angle ABD and angle ABC - angle ACB = 37 degrees. Find angle DBC in degrees.

Guest Jul 6, 2021

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208

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geometry problem

In triangle PQR, angle P = angle Q + angle R + 30 degrees. Of all three exterior angles of triangle PQR, what is the least exterior angle, in degrees?

Guest Jul 6, 2021

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203

0

help algebra

For a certain value of k, the system
x + y + 3z = 10
-4x - 3y + 5z = 7
kx + z = 3 read more ..

Guest Jul 6, 2021

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220

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coordinates

Let A = (6,2), and let B be the reflection of A over the line y = 2x + 5 . Find the coordinates of B.

Guest Jul 6, 2021

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188

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help polynomial

Let f(x) be a polynomial such that f(0) = 4, f(1) = -5, and f(2) = 10. Find the remainder when f(x) is divided by x(x - 1)(x - 2).

Guest Jul 6, 2021

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203

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help quadratic

Find the sum of all possible positive integer values of b such that the quadratic equation 2x^2 + 15x + b = 0 has rational roots.

Guest Jul 6, 2021

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399

1

help plz

For every value of a, the graph of each of these three equations is a line:
ax + y = 1
x + ay = 1
x + y = 9 read more ..

Guest Jul 6, 2021

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229

0

help number theory

Find the smallest positive integer N with the following property: of the three numbers N, N + 1, and N + 2, one of them is divisible by 3^2, one of them is divisible by 5^2, one is divisible by 7^2, and one is divisible by 9^2, and one is divisible read more ..

Guest Jul 6, 2021

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531

2

If 2010a + 2014b = 2018 and 2012a + 2016b = 2020, what is the value of a - b?

If 2010a + 2014b = 2018 and 2012a + 2016b = 2020, what is the value of a - b?

Guest Jul 6, 2021

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429

1

HELP!

Bottle A contains more soda than Bottle B. Pour from Bottle A into Bottle B as much soda as B already contains. Now pour from B into A as much soda as A now contains. Then pour from A into B as much soda as B now contains. Each bottle now contains 64 ounces. read more ..

Guest Jul 6, 2021

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223

0

Quadratic

What is the largest number c such that 2x^2 + 5x + c = -x^2 + 12x + 18 has at least one real solution? Express your answer as a common fraction.

Guest Jul 6, 2021

Jul 5, 2021

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206

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Graphs

A and B are constants such that the graphs of xy = B and y = Ax^2 + B intersect at the point (2,8). Write the ordered pair (A,B).

Guest Jul 5, 2021

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255

1

help plz thx

Let a, b, c be three (not necessarily distinct) nonzero digits. Given that the positive integer N always divides the sum of six three-digit number abc, acb, bac, bca, cab, cba, what is the maximum possible value of N?

Guest Jul 5, 2021

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195

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help plz

If the slope-intercept form of the line through (0,5) and perpendicular to the line 3y+7x=4 is y=mx+b, find m⋅b.

Guest Jul 5, 2021

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