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All Questions
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234777 Questions
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395
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+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
0
424
1
+501
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
+1
264
0
I love you
I love you♡♡♡
Guest
Feb 17, 2021
0
496
1
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
0
384
1
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
0
351
0
+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
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Hitago
Feb 17, 2021
0
335
1
Help with Modular Arithmetic Inverses (Yuck!)
What is in modulo 25?
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Guest
Feb 17, 2021
0
503
2
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
0
652
1
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
0
697
1
Suppose that a and b are digits in base d>6 such that . Find A_d - B_d in base d .
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
0
353
1
which term
Which term of the sequence 8 - 6i, 7 - 4i, 6 - 2i, ..., is pure imaginary?
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Guest
Feb 17, 2021
0
729
1
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
0
379
1
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
0
829
1
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
0
1579
1
N is the incenter of triangle ABC
N is the incenter of triangle ABC. Use the given information to find NF.
ND = 6x - 2
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Guest
Feb 16, 2021
0
385
1
+4
Hi! Can u pls help?
What is the value of if only when ?
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GEB11111
Feb 16, 2021
0
461
1
+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
0
362
1
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
0
364
5
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?
<
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Guest
Feb 16, 2021
+1
396
1
Solve for x
Solve for x
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Guest
Feb 16, 2021
0
445
1
+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
0
528
1
+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
0
553
1
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
0
268
1
complex function
Let
Find f(i) + f(1) + f(-1) + f(-i).
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Guest
Feb 16, 2021
0
295
0
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
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