All Questions

252

Palindromes

Find all four-digit palindromes that are divisible by 19.

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Guest Nov 20, 2022

247

Algebra

In November's Math Meet, the Little Monsters of Beast Academy solved 1/3 of the problems. In March's Math Meet, they solved 2/7 of the problems. (There might be different numbers of problems asked in November and March.)
In total, the Little Monsters read more ..

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Guest Nov 20, 2022

227

What is the mean of all possible positive three-digit integers in which no digit is repeated and all digits are prime?

Express your answer as a decimal

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Guest Nov 20, 2022

228

Help

The area of a semicircle is 56.52 square kilometers. What is the semicircle's diameter?
Use 3.14 for 𝜋.

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Guest Nov 20, 2022

205

Counting problem

In the array below, in how many different ways can we start with the letter A and move from letter to letter (horizontally, vertically, or diagonally), to spell the word "ARCH"?

A
RRR read more ..

Guest Nov 20, 2022

263

+660

Help is needed!

60 bricklayers began a 16-day project to build a castle. After five days, five of the bricklayers quit the job. If they work the same amount each day, how many extra day(s) (beyond the original estimate of 16) will the remaining bricklayers need? read more ..

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Keihaku Nov 20, 2022

201

NEED HELP ASAP

The perpendicular bisector of line segment $\overline{AB}$ is the line that passes through the midpoint of $\overline{AB}$ and is perpendicular to $\overline{AB}$.
What is an equation for the perpendicular bisector of the line segment joining $(1,2)$ read more ..

Guest Nov 20, 2022

200

Algebra

Find all real values of x such that
(x^2 + 2x + 5 - x - 4)(3x^2 - x - 4 + 2x + 8) >= 0

Guest Nov 20, 2022

224

help

The area of a semicircle is 56.52 square kilometers. What is the semicircle's diameter?
Use 3.14 for 𝜋.

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Guest Nov 20, 2022

280

Probability question

In Ms. Q's deck of cards, every card is one of four colors (red, green, blue, and yellow), and is labeled with one of seven numbers (1, 2, 3, 4, 5, 6, and 7). Among all the cards of each color, there is exactly one card labeled with each number. The read more ..

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Guest Nov 20, 2022

196

...

a/b +c/d

Guest Nov 20, 2022

212

counting

A certain club has 50 people, and 10 members are running for president. Each club member either votes for one of the 10 candidates, or can abstain from voting. How many different possible vote totals are there?

Guest Nov 20, 2022

207

What do you get when you add exponential forms? (e^5pi/6 + e^4pi/3)^9 (e^5pi/6 - e&4pi/3)^9

What do you get when you add exponential forms?
(e^5pi/6 + e^4pi/3)^9
(e^5pi/6 - e^4pi/3)^9

Guest Nov 20, 2022

253

Please help me with this question

How many triangles can be counted in this diagram?

read more ..

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Guest Nov 20, 2022

235

Algebra

Arrange the following numbers in increasing order (smallest first, biggest last):

A = 2*1/2*4*1/6
B = 12*128 read more ..

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Guest Nov 20, 2022

213

Triangle

Triangle ABC is a right triangle with angle BAC= 90 degrees and angle B > angle . Suppose AP is an altitude of the triangle, AQ is an angle bisector of the triangle, and AR is a median of the triangle, and angle PAQ = 18 degrees. If P read more ..

Guest Nov 20, 2022

218

precalc

(a) In triangle ABC, angle BCA = pi/4, AB = 5, and AC = 6. Find the sum of all distinct possible values of BC If there are no possible values, enter 0.

(b) In triangle ABC, angle BCA = pi/4, AB = 6, and AC = 4. Find read more ..

Guest Nov 20, 2022

207

Algebra

Carissa the chessplayer is a very, very slow walker. In fact, she walks at 100 meters per hour when walking uphill, 150 meters per hour when walking across flat ground, and 200 meters per hour when walking downhill. One day, Carissa walks read more ..

Guest Nov 20, 2022

268

+96

Im just confused

Find an equation for a line passing through (10,10) that is perpendicular to the line with equation 5x+8y=-9 . Write your equation in either point-slope form or slope-intercept form.

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coolkidslovemath1982 Nov 20, 2022

275

helppp

Suppose we have a bag with 10 slips of paper in it. Eight slips have a 3 on them and the other two have a 9 on them.
How many 9's do we have to add to make the expected value equal to 6?

Suppose we have a bag with 10 slips read more ..

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Guest Nov 20, 2022

299

SOLVE FOR X

Need to find the temperature for a room to make relative humidity accurate... Solve for X.
0=.972977645x+.000012890360x2+-.0000000024780681x3+6.5559673lnx- (4320.368041)

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Guest Nov 20, 2022

276

help algebra

A magician makes potions by combining maple syrup from a magical maple tree with ordinary water. The magician starts with a large supply of two potions: a red potion, which is 50% magical syrup by volume (and the rest is just water), and blue potion, which read more ..

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Guest Nov 20, 2022

258

System

Find the ordered quintuplet (a,b,c,d,e) that satisfies the system of equations
a + 2b + 3c + 4d + 5e = 41
2a + 3b + 4c + 5d + e = 57
3a + 4b + 5c + d + 2e = 34 read more ..

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Guest Nov 20, 2022

241

Geometry

Let ABC be a triangle, and let its angle bisectors be AD, BE, and CF, which intersect at I. If DI = 3, BD = 4, and BI = 8, then find the area of triangle ABC.

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Guest Nov 20, 2022

254

Expected value

Three standard fair 6-sided dice are rolled. What is the expected number of 6's rolled? (For example, if two 6's and a 5 are rolled, then the answer is 2.)

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Guest Nov 20, 2022

All Questions ⁺⁰238239 Questions

Palindromes

Algebra

What is the mean of all possible positive three-digit integers in which no digit is repeated and all digits are prime?

Help

Counting problem

Help is needed!

NEED HELP ASAP

Algebra

help

Probability question

...

counting

What do you get when you add exponential forms? (e^5pi/6 + e^4pi/3)^9 (e^5pi/6 - e&4pi/3)^9

Please help me with this question

Algebra

Triangle

precalc

Algebra

Im just confused

helppp

SOLVE FOR X

help algebra

System

Geometry

Expected value

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