All Questions ⁺⁰238211 Questions

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371

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polar graphing

What is the equation of this cardioid? Help would be appreciated!

Guest Dec 29, 2021

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277

0

Domain

What is the domain of the function $w(x) = \sqrt{x - 2} + \sqrt[3]{x - 2}$? Express your answer in interval notation.

Guest Dec 29, 2021

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290

0

Help complex numbers

There exists a complex number of the form z = x + yi, where x and y are positive integers, such that
z^3 + 14 = -74 + ci,
for some integer c. Find z.

Guest Dec 29, 2021

0

351

1

Seqeunce

Each successive term in the sequence 2048, 128, x, y, ... is obtained by multiplying the previous term by a constant. What is the value of x+y?

Guest Dec 29, 2021

0

518

7

+11

Geometry problem

The two diagonals of quadrilateral ABCD intersect at E. We know DC=12,CA=21,AB=18,BD=19, and Angle ABD=angle ACD. Find [BEC]/[AED].

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fuhsah Dec 29, 2021

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359

1

Algebra

Find 2^x if
2^x + 3^y = 13
2^(x + 2) + 3^(y + 1) = 43

Guest Dec 29, 2021

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426

3

Please help

Natalie spent 1/4 of a day doing her homework. Kelvin took 2/3 of the time
taken by Natalie to do his homework. How much faster is Kelvin
compared Natalie? (Take 1 day = 24 hours)

Guest Dec 29, 2021

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370

2

Geometry

A fence encloses a square field whose sides measure 10m. A horse is tethered on a rope that is attached to a corner post of the field so that the horse is outside the fence.If the rope holding the horse is 20m long, find the total grazing area of the horse read more ..

Guest Dec 29, 2021

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357

1

Need help

If the first three terms of an arithmetic progression are (x+3). (3x-10) and (2x+12), find x.

Guest Dec 29, 2021

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376

2

Help asap

Fann has 2 3/5 times the number of stamps that Alex has. What is the ratio of the
number of Alex's stamps to Fann's stamps?

Guest Dec 29, 2021

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476

4

+183

Im not good at Number Theory

The four-digit numeral 3AA1 is divisible by 9. What does A represent.

SmartWater Dec 29, 2021

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416

2

Math

One-third of Lemmie's toys exceeds one-fourth of the same toys by 18. What is half of the Lemmie's toys?

Guest Dec 29, 2021

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386

4

Kate's brother

When Kate was born, her older brother was 4 less than 1/4 of her mother's age. 8 years later,
her mother was 5 less than 3 times her brother's age. How old is Kate's brother now? Thanks for help.

Guest Dec 29, 2021

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396

1

Number Theory

Jai alai balls come in boxes of 8 and 17, so that 25 balls (one small box and one large box) can be purchased without having to break open a box, but 26 balls cannot. Find the maximum number of balls that cannot be bought without breaking boxes.
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Guest Dec 29, 2021

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538

1

Inequality

Find the interval of all x such that $1-3x < x \le 1-x +3x - 7$. Give your answer in interval notation, simplifying any fractions which appear in your answer.

Guest Dec 29, 2021

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391

1

Coordinates

Given points P(-3,4) and Q(4,y) in a coordinate plane, for what value y of is the slope of the line through P and Q equal to 1/7?

Guest Dec 29, 2021

0

372

1

help Algebra

When the expression
1-1x+2x^2-2-3x+3x^2-4+4x-5x^2-6x+7-8x^2
written in the form ax^2 + bx + c, where a, b, and c are non-zero integers, what is the value of a + b + c?

Guest Dec 29, 2021

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415

1

Number Theory

As n ranges over the positive integers, what is the maximum possible value for the greatest common divisor of 11n + 3 and 2n + 1?

Guest Dec 29, 2021

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322

1

Number Theory

How many two-digit positive integers are congruent to 1 (mod 7)?

Guest Dec 29, 2021

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390

1

Geometry

In triangle ABC, AB=5, AC=6, and BC=8. Circles are drawn with centers A, B, and C, so that any two circles are externally tangent. Find the sum of the areas of the circles.

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Guest Dec 29, 2021

0

404

5

Digits

A three-digit even number is given such that the hundreds, tens, and unit digits respectively form a decreasing arithmetic sequence. When two is added to the number, the same order of the digits now forms a geometric sequence. What is the original read more ..

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Guest Dec 29, 2021

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331

1

Probability

The numbers from 1 to 11 are drawn at random. Find the probability that the even numbers will all be drawn before the number 11.

Guest Dec 29, 2021

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429

3

need help

To fill an empty cistern, we can use pipe A which would take 20 minutes, or we can use pipe B which would take 15 minutes, or we can use pipe C which would take 12 minutes.
If we turned on all three pipes, how long will it take to fill up the empty read more ..

Guest Dec 29, 2021

0

341

2

plz help ASAP

Guest Dec 29, 2021

0

338

1

Probability

Two points on the rim of a circle are randomly chosen. What is the probability that the distance between the points is shorter than the side length of a square inscribed in the circle?

Guest Dec 29, 2021

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