All Questions ⁺⁰237681 Questions

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459

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Counting

Mable has a penny, a nickel, a dime, and a quarter, and a half-dollar (1, 5, 10, and 25 and 50 cents, respectively).How many different amounts can Mable make using at least one of the coins she has?

Guest Jul 29, 2021

0

471

1

Altitude calculation

when an airplane leaves the runway, its angle of ascent 16 degrees, with a speed of 80 m/s. find the altitude of the plane after 2 minutes

Guest Jul 29, 2021

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264

0

Piecewise function

For some constants a and b let
f(x) = 32 - 3x if x <= 8
f(x) = ax + b if x > 8
read more ..

Guest Jul 29, 2021

0

417

1

+8

Need help ASAP

What are all possible ways of writing 1/64 as an integer raised to an integer power? Explain why each expression you found equals , and try to explain why there are no other possibilities besides the ones you found.
Tip: Pay attention read more ..

Looooo Jul 29, 2021

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460

1

need help

Given positive integers x and y such that $x\neq y$ and 1/x + 1/y = 1/20, what is the smallest possible value for x + y?

Guest Jul 29, 2021

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363

2

help geometry

As shown in the digram, PQ/QR =1/3 and AB/BR = 2/7. Find [PAB]/[PBR].

Guest Jul 29, 2021

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418

4

help!

Two real numbers are chosen at random between 0 and 2 What is the probability that the sum of their squares is no more than Express your answer as a common fraction in terms of $\pi$.

Guest Jul 29, 2021

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311

1

geometry

Segments CD and AB are parallel. If CD = 2, AB = 4, and [CDP] = 5, find [ABCD].

Guest Jul 29, 2021

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269

0

geometry

In the figure shown, ABCD is a square and CDE is equilateral. What is the degree measure of CBE?

Guest Jul 29, 2021

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330

1

help algebra

What non-zero integer must be placed in the square so that the simplified product of these two binomials is a binomial: $(3x+2)(18x-\Box )$?

Guest Jul 29, 2021

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414

1

coordinates

The slope of a line is -2 and its x-intercept is (-5,0). What is the y-intercept point of the line? Express your answer as an ordered pair.

Guest Jul 29, 2021

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271

0

function

Given that f(x) = x^{-1} + 1/(x + 1), what is f(f(-2))? Express your answer as a common fraction.

Guest Jul 29, 2021

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340

1

Please answer question

A stick has a length of $5$ units. The stick is then broken at two points, chosen at random. What is the probability that all three resulting pieces are shorter than $2$ units?

Guest Jul 29, 2021

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368

1

Answer question here please

A stick has a length of $5$ units. The stick is then broken at two points, chosen at random. What is the probability that all three resulting pieces are shorter than $2$ units?

Guest Jul 29, 2021

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298

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help number theory

What integer n satisfies 0 <= n < 101 and 100n = 72 + 2 + 1 (mod 101)?

Guest Jul 29, 2021

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269

0

Domain

The domain of the equation y = 3x/(x^2 - 6x + 4) is the set of all real numbers with the exception of the values x = A and x = B. What is A + B?

Guest Jul 29, 2021

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320

1

HeLp WitH MatRicEs

Consider the matrices
is the matrix
is the matrix that rotates vectors by counterclockwise
read more ..

Guest Jul 29, 2021

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280

0

Domain

If h(x) is a function whose domain is [-8,8], and g(x) = h(x^2), then the domain of g(x) is an interval of what width?

Guest Jul 29, 2021

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365

1

Pyramid

A right pyramid has a square base with side length 10 cm. Its peak is 12 cm above the center of its base. What is the total surface area of the pyramid, in square centimeters?

Guest Jul 29, 2021

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281

0

HELP!

Five people are each wearing a different hat. They all put their hats in a box. Then, one at a time, they reach into the box and take a random hat (putting it back on their head). What is the probability that exactly three people are wearing the same hat read more ..

Guest Jul 29, 2021

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285

0

Domain

Suppose the domain of f is (-1,1). Define the function j by j(x) = f(x - 1). What is the domain of j?

Guest Jul 29, 2021

+2

414

1

+22

Graphing question

Here is my problem I think this is the graph

Please tell me if I am right or correct me read more ..

ninjahelper5 Jul 29, 2021

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362

1

trapezoid

As shown in the diagram, PQ is the median of trapezoid ABCD where AB = 25 inches and CD = 30 inches. Find XY in inches.

read more ..

Guest Jul 29, 2021

+5

594

1

+876

A 'Shortcut' I found!

OK, so today I was reading some math books to cure my boredom and then I found a problem containing maximizing values.
Here it is:
Consider real $(x, y).$ Given $x^2 + y^2 = 1$, find $\text{max}((x+y)^2).$
So this is how read more ..

MathProblemSolver101 Jul 29, 2021

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