All Questions

461

+206

Help Me

If $-5\leq a \leq -1$ and $1 \leq b \leq 3$, what is the least possible value of $\displaystyle\left(\frac{1}{a}+\frac{1}{b}\right)\left(\frac{1}{b}-\frac{1}{a}\right) $? Express your answer as a common fraction.

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oliviapow06 Feb 17, 2021

498

+502

Help Please

Simplify
$$\dfrac{7x^{2014}}{4x^{2013}}\cdot{\dfrac{2x^{2012}}{28x^{2011}}}\cdot\dfrac{9x^{2007}}{x^{2008}}\cdot\dfrac{8x^{2009}}{6x^{2010}}.$$
Assume that $x \neq 0.$

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ellapow Feb 17, 2021

327

I love you

I love you♡♡♡

Guest Feb 17, 2021

543

Chanelle has 3 quarters and 12 dimes

Chanelle has 3 quarters and 12 dimes. How many quarters should be added so that the ratio of quarters to dimes is 1:2?

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Guest Feb 17, 2021

450

proportion problem

Lee needs to mix 3.5 gallons of liquid fruit punch concentrate with 3gallons of water to make fruit punch. He wants to make 32.5 gallons of fruit punch. How much fruit punch concentrate will he need?

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Guest Feb 17, 2021

409

+50

Doubts about powers with real exponent

While studying the sign of the sequence $(a_n)_n = \left(\frac{1}{n}-\sin \frac{1}{n}\right)^x$ with $x\in\mathbb{R}$ I had the following doubt: since I know that for all $t \geq 0$ it is $t \geq \sin t$ and since $\frac{1}{n} >0$, it is surely read more ..

Hitago Feb 17, 2021

400

Help with Modular Arithmetic Inverses (Yuck!)

What is in modulo 25?

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Guest Feb 17, 2021

571

The quadratic has the following unexpected property: the roots, which are and -2, are one less than the final two coefficients. Now

The quadratic has the following unexpected property: the roots, which are and -2, are one less than the final two coefficients. Now find a quadratic with leading term such that the final two coefficients are both non-zero, read more ..

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Guest Feb 17, 2021

711

help quickly please

The table shows the number of correct answers on a practice standardized test. You score 86 points on the test, and your friend scores 76 points. How many points is each type of question worth?
read more ..

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Guest Feb 17, 2021

761

Suppose that a and b are digits in base d>6 such that . Find A_d - B_d in base d .

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Guest Feb 17, 2021

422

which term

Which term of the sequence 8 - 6i, 7 - 4i, 6 - 2i, ..., is pure imaginary?

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Guest Feb 17, 2021

796

hand sanitizer

Jason has 4 gallons of hand sanitizer that contains 25% alcohol. He wants to make a hand sanitizer that contains 50% alcohol. How many gallons of pure alcohol should he add?

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Guest Feb 17, 2021

449

interest

Cedric has deposited 12,000 into an account that pays 5% interest compounded annually.
Daniel has deposited 12,000 into an account that pays 7% interest compounded annually.
In 15 years Cedric and Daniel compare their respective balances. To the nearest read more ..

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Guest Feb 17, 2021

Feb 16, 2021

865

The two triangles below are similar. What is the perimeter of triangle XYZ?

The two triangles below are similar. What
is the perimeter of triangle XYZ?

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Guest Feb 16, 2021

1613

N is the incenter of triangle ABC

N is the incenter of triangle ABC. Use the given information to find NF.

ND = 6x - 2
read more ..

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Guest Feb 16, 2021

458

Hi! Can u pls help?

What is the value of if only when ?

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GEB11111 Feb 16, 2021

527

+17

pls help!!!! what is the 1.interest rate for each conversion period 2. the number of conversion periods

a) an investment at 5%/a, compounded annually, for 5 years
b) an investment at 4.5%/a, compounded semi-annually, for 42 months
c) a loan at 5.2%/a, compounded weekly, for 2 years

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frosttyfrog Feb 16, 2021

442

coefficient

What is the coefficient of x^2 when -5x^3 - 5x^2 - 7x + 1 is multiplied by -x^2 + 6x + 1 and the like terms are combined?

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Guest Feb 16, 2021

436

Mixed percentages

Substance 1 contains 13% of A, 62% of B and 25% of C. Substance 2 contains 5% of A, 77% of B, and 18% of C. Substance 3 contains 29% of A, 13% of B, and 58% of C. How many parts of each to get 10% A, 50% B and 40% C? How do I solve this problem?
<read more ..

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Guest Feb 16, 2021

471

Solve for x

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Guest Feb 16, 2021

508

+96

aaaaa geometryy

Let PQR be a triangle such that P=Q+R. Among all three exterior angles of triangle PQR, what is the smallest exterior angle, in degrees?

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kanisan Feb 16, 2021

599

+96

Geometry help

The exterior angles of a triangle are in the ratio 3:4:5. What is the measure (in degrees) of the least interior angle of the triangle?

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kanisan Feb 16, 2021

617

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

Let S be the set of complex numbers z 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.

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Guest Feb 16, 2021

337

complex function

Let

Find f(i) + f(1) + f(-1) + f(-i).

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Guest Feb 16, 2021

352

Principles of finance

The process of channeling savings into investment through the use of a financial institution or intermediary results in no real economic value

Guest Feb 16, 2021

All Questions ⁺⁰237722 Questions

Help Me

Help Please

I love you

Chanelle has 3 quarters and 12 dimes

proportion problem

Doubts about powers with real exponent

Help with Modular Arithmetic Inverses (Yuck!)

The quadratic has the following unexpected property: the roots, which are and -2, are one less than the final two coefficients. Now

help quickly please

Suppose that a and b are digits in base d>6 such that . Find A_d - B_d in base d .

which term

hand sanitizer

interest

The two triangles below are similar. What is the perimeter of triangle XYZ?

N is the incenter of triangle ABC

Hi! Can u pls help?

pls help!!!! what is the 1.interest rate for each conversion period 2. the number of conversion periods

coefficient

Mixed percentages

Solve for x

aaaaa geometryy

Geometry help

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

complex function

Principles of finance

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