All Questions

414

Help with algebra

A mathematician works for t hours per day and solves p problems per hour, where t and p are positive integers and 1 < p < 20. One day, the mathematician drinks some coffee and discovers that he can now solve 3p + 1 problems read more ..

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Guest Jul 11, 2021

450

trig

For how many values of 0 <= x < 3600 satisfy sin(x) = -0.73?

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Guest Jul 11, 2021

369

Number Theory

What is the smallest positive integer that has exactly 2000 divisors? Thank you.

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Guest Jul 11, 2021

511

+50

Counting and Probability problem

Suppose we take two fair dice, but change the numbers on the faces. On one die, we'll replace the 2 with a 5, and on the other, we'll replace the 5 with a 2. What is the probability that the sum of the numbers are shown when both are rolled is 7? I tried read more ..

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HELPplzplzplz Jul 11, 2021

339

Counting

How many continuous paths from A to B, along segments of the figure, do not revisit any of the six labeled points?

Guest Jul 11, 2021

328

System

Let (x_1, y_1), (x_2, y_2), ..., (x_n, y_n) be the real solutions to the system
x + 8y = 7
x^3 + 8y^3 = 343/81
Enter x_1 + y_1 + x_2 + y_2 + ... + x_n + y_n. read more ..

Guest Jul 11, 2021

477

help geometry

1) Let ABCDE be a regular pentagon. Prove that AC bisects angle BCE and AD bisects angle BDE.
2) In quadrilateral BCDE, CBD = 31 degrees, CED = 47 degrees, BCE = 85 degrees. Find angle BDE.

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Guest Jul 11, 2021

309

System

For a certain value of k, the system

x + y + 3z = 10
-4x + 8y + 5z = 7 read more ..

Guest Jul 11, 2021

313

geometry question

Triangle ABC is isosceles with AB = BC. If AC = 20 and [ABC] = 280, then find the perimeter of triangle ABC.

Guest Jul 11, 2021

450

Quadratic

The equation y = -16t^2 + 26t + 105 describes the height (in feet) of a ball tossed up in the air at 26 feet per second from a height of 105 feet above the ground. In how many seconds will the ball reach 110 feet? Express your answer as a decimal rounded read more ..

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Guest Jul 11, 2021

533

Number Theory

If $3x+7 \equiv 11$ (mod $16$), then 2x+11 is congruent (mod 16) to what integer between 0 and 15, inclusive?

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Guest Jul 11, 2021

510

Number Theory

Find $14^{-1}$ (mod $35$), as a residue modulo 35. (Give an answer between 0 and 34, inclusive.)

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Guest Jul 11, 2021

482

Geometry

Find length BC.

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Guest Jul 11, 2021

468

Perimeter

Find the perimeter of triangle XYZ.

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Guest Jul 11, 2021

514

Trig help needed, there's a picture

What are in radians (or fractions)?

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Guest Jul 11, 2021

448

Help

Consider triangle ABC in the picture below. Angle A=30 degrees. Angle C=45 degrees. Side AB=10.
What are AC and BC?

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Guest Jul 11, 2021

487

I need help please.

Professor Bloop has another one of his insane experiments in progress. He is designing a machine to remove the shells from hard-boiled eggs all in one piece. He makes a voltage measurement at terminal 23B on his machine and finds it at -5.2 volts. "Amazing!" read more ..

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Guest Jul 11, 2021

404

Please Help ASAP with all steps

Consider triangle ABC such that AB=24, BC=13 and as shown in the picture below. What are and ?
Thank you, please read more ..

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Guest Jul 11, 2021

375

Percent

At Tomi's middle school, 40% of the students are boys. Fifty percent of the boys chose blue as their favorite color, while 30% of the girl students chose blue as their favorite color. Of the students who chose blue as their favorite color, what fraction read more ..

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Guest Jul 11, 2021

359

Counting question

How many ways are there to divide a group of 6 friends among the basketball team, the soccer team, the track team, and the croquet team? (Each team could have anywhere from 0 to 6 of the friends on it. Assume the friends are distinguishable.)

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Guest Jul 11, 2021

565

The GCF of 6 and two other numbers is 6. What must be true about the other two numbers?

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Guest Jul 11, 2021

424

help coordinates

A line has a slope of -7/3 and its y-intercept is (0,18) . What is its x-intercept?

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Guest Jul 11, 2021

475

Help Please

Identify a number that is divisible by 8, 6, 4, 16, and 12, which is not divisible by 18, 7, 9, 5, and 15. Describe how you found the number.

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Guest Jul 11, 2021

461

Power of a point

In the diagram below, EU = 8, UF = 7,GV = 5, VH = 16, and UV= 8. Find XY.

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Guest Jul 11, 2021

489

urgent please help

Mr. Hawkins had received two hundred fifty acres as his head right when he came to the Plymouth Colony. He gave one-eight of his land to his brother. How many acres did he have left?

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Guest Jul 11, 2021

All Questions ⁺⁰238211 Questions

Help with algebra

trig

Number Theory

Counting and Probability problem

Counting

System

help geometry

System

geometry question

Quadratic

Number Theory

Number Theory

Geometry

Perimeter

Trig help needed, there's a picture

Help

I need help please.

Please Help ASAP with all steps

Percent

Counting question

The GCF of 6 and two other numbers is 6. What must be true about the other two numbers?

help coordinates

Help Please

Power of a point

urgent please help

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