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All Questions
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234795 Questions
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468
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complex numbers :)
Prove that if $w,z$ are complex numbers such that $|w|=|z|=1$ and $wz\ne -1$, then $\frac{w+z}{1+wz}$ is a real number.
I tried solving it but I'm stuck. I know that you should multiply by the conjugate of the denominator, but I don't
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Guest
Sep 1, 2020
0
1102
1
help please
a town has a population of 4000 and grows 2% every year. to the nearest year, how long will it be until the population will reach 6400?
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Guest
Sep 1, 2020
0
437
1
triangle
What is the value of y?
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Guest
Sep 1, 2020
0
1013
2
math problem
A department store gives away a $10 gift card to every 20th customer and a $15 gift card to every 45th customer. Which customer will be the first to recieve both gift cards after this customer receives both gift cards what is the total amount in gift cards
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Guest
Sep 1, 2020
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521
1
+20
How to solve this inequality?
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jumo98
Sep 1, 2020
0
528
1
line equation
Find the equation of the line T=through (-3,-5), perpendicular to -2x - 5y = -19
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Guest
Sep 1, 2020
0
1
717
1
please help
How much 45% disinfectant solution must be mixed with a 30% disinfectant solution to produce 20 gal of 39% solution?
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Guest
Sep 1, 2020
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452
2
please help!!
a) Show that n(2n + 1)(7n + 1) is divisible by 6 for all integers n.
b) Find all integers n such that n(2n + 1)(7n + 1) is divisible by 12.
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Guest
Sep 1, 2020
0
1
1634
1
helppp
Last year at a certain high school, there were 100 boys on the honor roll and 50 girls on the honor roll. This year, the number of boys on the honor roll increased by 20% and the number of girls on the honor roll increased by 18%. By what percentage did
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Guest
Sep 1, 2020
0
695
1
HELP
A piece of sheet metal has dimensions 2 2 3 ft ✕ 6 3 4 ft. What is the area in square inches?
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Guest
Sep 1, 2020
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471
1
word problem
Akana has some dimes and some quarters. She has at most 25 coins worth a minimum of $4.45 combined. If Akana has 17 dimes, determine all possible values for the number of quarters that she could have. Your answer should be a comma separated list of values.
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Guest
Sep 1, 2020
0
552
1
+35
trinomial
what is the gcf of this trinomial? 6x^3y^4+24x^6y^2-36x^3y^3
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maximusaurelius117
Sep 1, 2020
0
358
1
geometry problem
Find angles A, B, C, and D.
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Guest
Sep 1, 2020
0
820
7
HELP PLEASEEEEE
Let and be distinct real numbers such that
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Guest
Sep 1, 2020
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486
1
algebra
Which of the following equations to 3y= 12x-6?
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Guest
Sep 1, 2020
+1
461
1
inequality question
Which inequality is represented by the graph?
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Guest
Sep 1, 2020
0
1504
5
Halp!!!
In physics, Ohm's law says that current through a wire, $I$, is directly proportional to voltage, $V$, and inversely proportional to resistance, $R$: \[I=\frac{V}{R}.\]It's also true that resistance is directly proportional to the length of the wire. We
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Guest
Sep 1, 2020
0
1113
1
Help Please
A plane flies from Penthaven to Jackson and then back to Penthaven. When there is no wind, the round trip takes 6 hours and 24 minutes, but when there is a wind blowing from Penthaven to Jackson at 50 miles per hour, the trip takes 6 hours and 40 minutes.
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Guest
Sep 1, 2020
Aug 31, 2020
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529
1
helpppp
At a sale, dresses were sold for $34 each. This price was 85% of a dress's original price. How much did a dress originally cost?
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Guest
Aug 31, 2020
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468
1
inequality question
Which inequality is represented by the graph?
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Guest
Aug 31, 2020
0
565
1
rate question
Clint and Jim rode their bicycles to Mill Park at an average of 8 mi/hr. It took then 1 hr longer to return home riding at an average of 7 mi/hr on a route that was 4 mi longer than their route. How long were they riding their bicycles? How man miles did
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Guest
Aug 31, 2020
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588
1
What is the reciprocal of ? Express your answer as a decimal.
What is the reciprocal of ? Express your answer as a decimal.
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Guest
Aug 31, 2020
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300
0
please help!
Select the equivalent expression.
Guest
Aug 31, 2020
0
369
1
word problem
Timmy went into a store and said "I'll buy that calculator for $10 if you lend me as much money as I have in my pocket. The clerk lent him the money and Timmy gave him $10 cash. He went to the next store and bought a $10 cap using the same gambit. Then
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Guest
Aug 31, 2020
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