All Questions ⁺⁰237785 Questions

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301

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quanto e mais a quarta parte de 60, estou com bastante dificuldade

quanto e mais a quarta parte de 60, estou com bastante dificuldade

Guest Jul 29, 2022

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311

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Help @ Cphil

Evaluate the infinite geometric series:

Guest Jul 29, 2022

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352

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HELP

In convex quadrilateral $ABCD$, $AB=8$, $BC=4$, $CD=DA=10$, and $\angle CDA=60^\circ$. If the area of $ABCD$ can be written in the form $\sqrt{a}+b\sqrt{c}$ where $a$ and $c$ have no perfect square factors (greater than 1), what is $a+b+c$?

Guest Jul 29, 2022

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200

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boxes

Two rectangular boxes have the same volume. One box is a cube, and the other box had dimensions 8 ft by 4 ft by 12 ft. How many feet long is an edge of the cube?

Guest Jul 29, 2022

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210

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radicals

sqrt(79 + 24*sqrt(7)) can be written in the form a + b*sqrt(c), where a, b and c are integers and c has no factors which is a perfect square of any positive integer other than 1. Find abc.

Guest Jul 29, 2022

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249

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counting

How many numbers can you get by multiplying two or more distinct members of the set {1, 2, 3, 4, 5, 11, 12, 13, 14, 15} together?

Guest Jul 29, 2022

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243

2

help (geo)

Given the diagram and that side BC is equal to DC + AB, deduce the perimeter of trapezoid ABCD.

Guest Jul 29, 2022

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207

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system

For which value(s) of k does the following system have no solution?

4x - 6y = -2
kx - 9y = 3 read more ..

Guest Jul 29, 2022

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201

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counting

Find the number of solutions to a + 2b + 3c = 6 in nonnegative integers.

Guest Jul 29, 2022

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210

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circles

A sector of a circle has a central angle of 100 degrees. If the area of the sector is 50pi, what is the radius of the circle?

Guest Jul 29, 2022

Jul 28, 2022

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298

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math problem

How many positive integers t will make the expression 19/t + 5/t + 2/t have an integral value?

Guest Jul 28, 2022

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305

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+27

Need a bit of help on this.

Calculate the rate of interest paid if an eight year investment of $5000 became $6000 dollars using simple interest

qtiop Jul 28, 2022

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264

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digits

Find the smallest positive integer where the product of the digits is equal to 1200.

Guest Jul 28, 2022

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215

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geometry

In triangle PQR, PQ = 13, QR = 14, and PR = 18. Let M be the midpoint line QR. Find PM.

Guest Jul 28, 2022

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264

2

Percent

The length of each edge of a cube is decreased by 40%.By what percent does the volume of the cube decrease? Express your answer to the nearest tenth.

Guest Jul 28, 2022

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311

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Inequality

Solve the inequality -4(x + 4) > x + 7 + 5(x + 2). Give the answer as an interval.

Guest Jul 28, 2022

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293

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Inequality

Solve the inequality 2x - 5 <= -x + 12 - 3x + 19 Give the answer as a interval.

Guest Jul 28, 2022

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205

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sequence

The sequence a_n satisfies a_0 = 1, a_1 = -1, and for i >= 2. Find a_{100}.

Guest Jul 28, 2022

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300

1

+4

Can someone help with this problem?

Points $A$, $B$, $C$, and $D$ lie on a line, in that order, with $AB = CD$ and $BC = 12$. Point $E$ is not on the line, and $BE = CE = 10$. The perimeter of $\triangle AED$ is twice the perimeter of $\triangle BEC$. Find $AB$.

bl4r99 Jul 28, 2022

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249

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Algebra

Five times a number is divided by 7 more than the original number. If the result is 7, then what was the original number?

Guest Jul 28, 2022

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255

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Algebra

Find all real numbers a that satisfy
1/(a^3 + 7) - 7 = -a^3/(a^3 + 7) + 5.

Guest Jul 28, 2022

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196

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Domain

The domain of the function r(x) = x^2/(1 - x) is (1,inf). What is the range?

Guest Jul 28, 2022

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