All Questions ⁺⁰237726 Questions

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Quadratic

Find the product of all positive integer values of c such that 8x^2+15x+c=7x^2+11x has two real roots.

Guest Jun 7, 2022

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Complex Numbers

Kelly and Avril chose complex numbers to represent their songs' popularities. Kelly chose 508+1749i. Avril chose 1322+19i. What is the sum of their numbers?

Guest Jun 7, 2022

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300

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Function

The domain of the function h(x) = \sqrt{25-x^2}+\sqrt{-(x-2)}+\sqrt{x} is an interval of what width?

Guest Jun 7, 2022

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290

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Proportion

Suppose that alpha is inversely proportional to beta$. If alpha = -6 when beta = -3, find alpha when beta = 8. Express your answer as a fraction.

Guest Jun 7, 2022

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290

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+103

Math

Blake and Adam have raised a total of $100. Blake raised 25% as much money as Adam. How much less money did Blake raise than Adam?

Robtlukas Jun 7, 2022

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Algebra question

What is the sum of all values of z such that z^2 = 12z - 7 - 12z + 7?

Guest Jun 7, 2022

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+58

Math

Ali had a certain amount of savings in the bank. In October, he spent 30% of her savings. In November, he managed to save 1/5 of the amount of money he had left. Then, he bought 2 calculators at $15.80 each and gave 3/8 of the amount that he had left to read more ..

swagmastercaillou Jun 7, 2022

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307

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triangles

The sides of a triangle are 7, 12, and x. What are all possible values of x?

Guest Jun 7, 2022

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215

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Math Question

Let S be the set of complex numbers such that the real part of 1/z is equal to 1/6. This set forms a curve. Find the area of the region inside the curve.

Guest Jun 7, 2022

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Interesting Math question

Four complex numbers form the vertices of a square in the complex plane. Three of the numbers are -19+32i, -5+12i and -22+15i. What is the fourth number?

Guest Jun 7, 2022

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Please I really need help

Let 0, a, b, c be the vertices of a square in counterclockwise order. Then enter b/a and c/a in that order in rectangular form.

Guest Jun 7, 2022

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https://web2.0calc.com/questions/need-the-workings-thx

Mickey and Minnie shared a box of matches. If Mickey was given 10 fewer matches, Minnie would have 5 times as many matches as Mickey.
If Mickey was given 10 more matches, he would have 1/2 as many matches as Minnie.
What percentage of matches did read more ..

Guest Jun 7, 2022

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300

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+113

Math

Mrs Koh baked 68 cookies on Monday. She baked 3/8 of the remaining cookies on Tuesday and the rest of the cookies on Wednesday. If she baked 65 cookies on Wednesday, how many cookies did she bake in the 3 days altogether?

tacoBRO1023 Jun 7, 2022

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284

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Complex numbers

If z = 3 + 4i + 5 + 6i, find z^2. (Note that i^2 = -1.)

Guest Jun 7, 2022

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help counting

English has letters that can be vowels. This includes Y, which can be either a consonant or a vowel; for this problem, we'll consider Y a consonant. The other English letters always consonants. How many two-letter "words" can read more ..

Guest Jun 7, 2022

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307

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Math problem

Given the equation a+b = 30 , where a and b are positive integers, how many distinct ordered-pair solutions (a,b) exist?

RainbowSquirrel53 ●

Guest Jun 7, 2022

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293

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Complex root

If 3 + 2i is a solution for x^2 + bx + c = 0, where b and c are real numbers, then what are b and c?

Guest Jun 7, 2022

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326

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Probability with balls and boxes

What is the probability that each box will contain one ball if two indistinguishable balls are randomly put in one of two distinguishable boxes?
To me there seems to be 2 possible ways to reach an answer:
First Method: Each ball has a 1/2 chance of read more ..

Guest Jun 7, 2022

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+4

Vectors Problem

Not to sure where to start from this problem

spoon114 Jun 7, 2022

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HELPPP

The punter on a special team unit kicks a football upward from the ground with an initial velocity of 63 feet per second. The height of the football stadium is 70 feet. The height of an object with respect to time is modeled by the equation:
read more ..

Guest Jun 7, 2022

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+166

Counting - Geometry

A solid cube is formed from 125 unit cubes. A set of smaller unit cubes will be removed, leaving behind a smaller solid cube. In how many ways can this be done?

RainbowSquirrel53 Jun 7, 2022

Jun 6, 2022

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Polygon

One interior angle of a convex polygon (a convex polygon is a polygon where all anglesare less than 180 degrees) is 120 degrees. All the other angles are 130 degrees. How many sides does the polygon have?

RainbowSquirrel53 ●

Guest Jun 6, 2022

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278

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Function

Let N,O be functions such that N(x) = 2*sqrt(x), and O(x) = x^2. What is N(O(N(O(N(O(3)))))?

RainbowSquirrel53 ●

Guest Jun 6, 2022

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