All Questions ⁺⁰237785 Questions

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401

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Trig

In right triangle BCD with angle D = 90 degrees, we have BC = 9 and BD = 8. Find sin B.

Guest Jan 10, 2022

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438

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geometry

In the figure below, side $AE$ of rectangle $ABDE$ is parallel to the $x$-axis, and side $BD$ contains the point $C$. The vertices of triangle $ACE$ are $A(1, 1)$, $C(3, 5)$ and $E(4, 1)$. What is the ratio of the area of triangle $ACE$ to the area of rectangle read more ..

Guest Jan 10, 2022

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248

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Geometry

In triangle XYZ, Y = 45 degrees and Z = 120 degrees. If XZ = 4, then what is XY?

Guest Jan 10, 2022

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396

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Function

Let
f(x) = 9x + 16 if x < 2,
f(x) = 8x - 40 if x >= 2.
read more ..

Guest Jan 10, 2022

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304

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Scientific Method Help Needed!

Observation 3: Seagulls covered with oil (from an oil spill) do not look as if they could fly.
Hypothesis:
Independent variable:
Dependent variable: read more ..

Guest Jan 10, 2022

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369

2

geometry

In a certain regular polygon, the measure of each interior angle is times the measure of each exterior angle. Find the number of sides in this regular polygon.

Guest Jan 10, 2022

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251

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geometry

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

Guest Jan 10, 2022

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282

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geometry

Triangle ABC is inscribed in equilateral triangle PQR, as shown. If PC = 3, BP = CQ = 1, and angle ACB = 90 degrees, then compute AQ.

read more ..

Guest Jan 10, 2022

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264

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Domain

Suppose the domain of f is (-1,1). Define the function k by h(x) = f(8x^3 + sqrt(x)). What is the domain of h?

Guest Jan 10, 2022

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369

2

Counting

How many numbers can be expressed as the sum of two or more distinct elements of the set ?

Guest Jan 10, 2022

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241

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help with algebra

What is the coeffiecient of x^3 in (x^2 + x + 1)^4?

Guest Jan 10, 2022

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355

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Algebra question

One positive integer is 55 less than twice another. The sum of their squares is 185. Find the integers.

Guest Jan 10, 2022

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401

4

Please help asap :)

Emily has a total of two hundred eight-two pennies, nickels, and quarters. She has three and a half times as many pennies as quarters and one-fifth as many nickels as quarters and one-fifth as many nickels as quarters. How many of each coin does she have? read more ..

Guest Jan 10, 2022

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433

4

+176

Math

Brandon has pennies, nickels and dimes. He
has a total of $7.48. He has ten fewer dimes
than pennies and six times as many nickels
as dimes. How many of each coin does he read more ..

Whayousayy Jan 10, 2022

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401

4

+53

Help please

Dylan's dimes total $1.30 less than his quarters of which he has one-fourth as many as he has nickels, which total $0 more than his dimes. How many of each coin does he have?

Sturasion12345 Jan 10, 2022

Jan 9, 2022

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392

2

geometry

ABCD is a square of side length 1, and M and N are the midpoints of sides AB and CD, respectively. AM and DC intersect at P. Find the area of triangle APM.

Guest Jan 9, 2022

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332

1

Algebra

If , m+(1/m) = 8 then what is the value of m^4 + 1/m^4?

Guest Jan 9, 2022

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377

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3d geometry

A cone is created by rotating a right triangle with leg length 3 and leg length 4 about the leg of length 4. Its surface area is pi times what number?

Guest Jan 9, 2022

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233

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Complex numbers

For complex numbers z, let
f(z) = z^2 if z is real
f(z) = z + 2 if z is not real
read more ..

Guest Jan 9, 2022

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257

0

Functions

Let f(x) be defined by
f(x) = 3 - x if x <= 3
f(x) = -x^3 + 2x^2 + 3x if x > 3
Calculate $f^{-1}(4) + f^{-1}(10)$

Guest Jan 9, 2022

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303

1

Number Theory

N is a positive integer. When N is divided by 3, the remainder is 2. When N is divided by 4, the remainder is 2. What is the remainder when N is divided by 12?

Guest Jan 9, 2022

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368

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Algebra

Find the value of y such that 9^y = 3^5*9^6*81^4/27^3.

Guest Jan 9, 2022

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267

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Absolute value

What is the least possible value of the sum | x - 1 | + | x - 1.5 | + | x - 3 | + | x - 5 |?

Guest Jan 9, 2022

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321

1

Number Theory

Let n be a positive integer and let k be the number of positve integers less than 2^n.If 2^n is congruent to (mod 13), then what is the remainder when k is divided by 13?

Guest Jan 9, 2022

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337

1

Number Theory

Erica and Andrew are playing a game. Erica starts by selecting three digits a, b, and c, and then Andrew needs to select a digit x such that the six-digit number axbxcx is a multiple of . What is the sum of all possible values of that read more ..

Guest Jan 9, 2022

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