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Post New Question
All Questions
+0
230874 Questions
0
2078
3
+119
Solution of sin(x)=1-2cos^2(x)
"Simplify using identities so that you can solve the equation. Give the general solution in radians."
sin(x)=1-2cos^2(x)
I ended up getting...
x = - pi/6 + n2pi, x = - 5pi/6 + n2pi, x = pi/2 + n2pi
...which apparently is incorrect. I'd appreciate
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Aleguan
Jan 16, 2018
0
3122
1
I have answers-Need To Make Sure I'm Right
1. The radioisotope Cobalt-60 is used in cancer therapy. The half-life of this isotope is 5.27 years.
Which equation determines the percent of an initial amount of the isotope remaining after t years?
A=5.27(12)100tA=5.27(12)100t
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Guest
Jan 16, 2018
0
4770
1
1. A population of bacteria doubles every 12 hours. Initially, the population of bacteria is 80.
1. A population of bacteria doubles every 12 hours. Initially, the population of bacteria is 80.
What is the population of the bacteria after 30 hours?
Round to the nearest whole number.
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Guest
Jan 16, 2018
+1
741
2
+1440
help need to know what im doing wrong
Coco flips a penny, a nickel, and a quarter. Each coin is fair (meaning that heads and tails are equally likely to come up). What is the probability that at least one of the coins comes up heads?
Enter your answer as a fraction in simplified form.
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SmartMathMan
Jan 16, 2018
+1
874
1
+1440
help urgent can anyone solve this?
Acme Corporation has released an alphabet soup in which each of the vowels (A, E, I, O, U) of the English alphabet appears five times (and the consonants do not appear at all). How many five-letter words can be formed from a bowl of Acme Vowel Soup? (Note:
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SmartMathMan
Jan 16, 2018
+1
1237
1
Geometry
Graph the image of the figure after a dilation with a scale factor of 3 centered at (2, −7) .
Use the Polygon tool to graph the quadrilateral by connecting all its vertices.
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Guest
Jan 16, 2018
0
610
1
+4116
Help.
Help.
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NotSoSmart
Jan 16, 2018
-1
620
0
+956
A lil more physics :O?
Okay so they provided us with a PhET lab, but my question is can you just provide me with the formula I need to calculate the frequency for the 1st, 2nd,
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Julius
Jan 16, 2018
+1
1006
1
+1440
help urgent problem
Tino's Ice Cream Shoppe features seven flavors: vanilla, chocolate, pistachio, coconut, blackberry, lemon, and saffron. Tino will gladly make you an ice cream shake featuring any two scoops you want (not necessarily of different flavors). For example, you
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SmartMathMan
Jan 16, 2018
+1
1361
1
+1440
Help plz anyone out there? no one?
In SHORT BINGO, a 5 x 5 card is filled by marking the middle square as WILD and placing 24 other numbers in the remaining 24 squares.
Specifically a card is made by placing 5 numbers from the set 1 - 10 in the first column, 5 numbers from 11
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SmartMathMan
Jan 16, 2018
0
1770
1
+27
Help Please!! Algebra 2
Factor the polynomial
−4y2+3xy−12y+9x
The first term of one factor is provided. Complete the factoring.
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mathretarted
Jan 16, 2018
0
720
1
+4116
Help.
Help.
Find the area of this parallelogram
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NotSoSmart
Jan 16, 2018
0
1253
2
+299
Use a number line to order the numbers from least to greatest
2.26, 12/5, 26.8%, 2.26, 271
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Nerd123
Jan 16, 2018
0
1048
2
http://prntscr.com/i1bhk7
http://prntscr.com/i1bhk7
What is the value of x?
Enter your answer, as a decimal, in the box.
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Guest
Jan 16, 2018
+1
953
6
+1450
Two problems that I never learned how to solve
Compute 1 - 2 + 3 - 4 + ... + 2005 - 2006 + 2007.
and
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AnonymousConfusedGuy
Jan 16, 2018
0
1127
1
HELPP PLEASE i NEED THIS DONE BY TODAY PLEASE
What is the value of x?
Enter your answer, as a decimal, in the box.
?cm
http://prntscr.com/i1bhk7
read more ..
TheXSquaredFactor
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Guest
Jan 16, 2018
0
572
2
The Australian Open
The Australian Open, which is underway right now, is a Grand Slam annual Tennis tournament. If the first round begins with 128 matches for both men and women, how many matches are played, in both men and women separately, in order to crown the Champion?
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Guest
Jan 16, 2018
+1
863
3
+1440
help plz
Tom got a Mr. Potato Head for his birthday. It came with 3 hairstyles, 2 sets of eyebrows, 1 pair of googly eyes, 2 sets of ears, and 2 sets of lips, a pair of regular shoes, and a bonus pair of clown shoes. If a complete Mr. Potato Head personality includes
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SmartMathMan
Jan 16, 2018
+1
843
1
+1440
help me!
How many different three-letter sets of initials are possible using the letters A through G?
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SmartMathMan
Jan 16, 2018
+1
645
1
+1440
help plz
There are 5 girls and 5 boys in a chess club. The club holds a round-robin tournament in which every player plays against every other player exactly once.
In how many games does a girl play against a boy?
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SmartMathMan
Jan 16, 2018
+1
983
2
+1450
The sum of the first n terms in the infinite geometric sequence {1/4, 1/8, 1/16, ...} is 255/512. Find n.
The sum of the first n terms in the infinite geometric sequence {1/4, 1/8, 1/16, ...} is 255/512. Find n.
👍 👍
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AnonymousConfusedGuy
Jan 16, 2018
+1
840
2
+1450
Another Quick Question
The roots of the equation 2x^2 - 5x - 4 = 0 can be written in the form x = (m±sqrt n)/p, where m, n, and p are positive integers with a greatest common divisor of 1. What is the value of n?
Thanks :D
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AnonymousConfusedGuy
Jan 16, 2018
0
861
1
+595
What are the domain and range of the function?
What are the domain and range of the function?
f(x)= -3/5x3
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jbouyer
Jan 16, 2018
0
5885
1
+595
Which graph represents the function f(x)= 2/x-1+3?
Which graph represents the function f(x)= 2/x-1+3?
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jbouyer
Jan 16, 2018
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