Answers edited by José F.

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• How do you simplify #abs(-30 - 5.5i )#?
  
• How do you find all the real and complex roots of #x^5 - 32 = 0#?
  
• How long do humans live in reference to the time scale of the universe?
  
• How do you find the zeros, if any, of #y= -x^4 -3x^2+17 #using the quadratic formula?
  
• How do you solve the inequality # |x + 2| ≤ 3# ?
  
• How do you find the exact values of cos 2pi/5?
  
• How do you find the domain and range for #f(x)= (x-3)/( x^2- 9)#?
  
• How do you find the exact relative maximum and minimum of the polynomial function of #4x^8 - 8x^3+18#?
  
• How do you convert -3.09 (09 repeating) to a fraction?
  
• Question #2f9e6
  
• Question #37778
  
• How far is a parsec?
  
• How do you multiply #0.31*69#?
  
• How do you simplify #(7x + 14)/( 8x + 16)#?
  
• Question #82567
  
• How do you solve #11<n/2 + 5#?
  
• How often does each location on Earth experience a total solar eclipse?
  
• How do you simplify #(sqrt 3 -sqrt 6) / (sqrt 3 +sqrt6)#?
  
• Question #d0593
  
• Question #e3088
  
• How do you solve #8^(0.2x) = 98.6#?
  
• How do you simplify and write #( 8mn^3)^0# with positive exponents?
  
• How do you solve #e^(4x - 6) - 8 = 11212#?
  
• How do you divide #(4+2i )/( 1-i)#?
  
• How do you solve #sqrt(x+3)-sqrt x=sqrt(4x-5)#?
  
• Are sand, salt, and water heterogenous or homogenous mixtures?
  
• How far is Earth from the center of the universe in AU?
  
• How do you solve #4^(x+5)=0.5#?
  
• How do you simplify #sqrt10 (3- 2sqrt6 )#?
  
• How do you solve #sqrt(2x-2) - sqrtx + 3 = 4#?
  
• The perimeter of an equilateral triangle is 51 inches. What is the length of each side?
  
• What is #3.53333...# as a fraction?
  
• How do scientists measure the size of the earth?
  
• Question #ad1dc
  
• When at closest approach to Earth, Planet X is observed to be 3.8 arcseconds in diameter. What is Planet X's diameter in meters?
  
• How do you factor the expression #15x^2-2x-8#?
  
• How do you write a polynomial function of least degree with integral coefficients that has the given zeros 5, -1, 0?
  
• How do you find the roots, real and imaginary, of #y=-5x^2 +40x -34 # using the quadratic formula?
  
• How do you solve #5^(x+2) = 8.5#?
  
• How do you solve #cos theta= sin theta#?
  
• Yasmin is thinking of a two-digit number. She adds the two digits and gets 12. She subtracts the two digits and gets 2. What was the two-digit number Yasmin was thinking of?
  
• What is the empirical formula of a compound containing 83% potassium and 17% oxygen?
  
• How do you solve #6^x + 4^x = 9^x#?
  
• The equation y=6.72(1.014)^x models the world population y, in billions of people, x-years after the year 2000. Find the year in which the world population is about 10 billion?
  
• Question #ac941
  
• And according to physics, Earth orbits faster when it is nearer the sun than when it is farther. Does this, in any way, affect the length of day in the earth?
  
• How do you find the value of #tan((pi)/4)#?
  
• Question #25ae4
  
• How do you solve the inequality # 1/(x+1)>3/(x-2)#?
  
• How do you solve #x/(x-9)-4=9/(x-9)#?
  
• How do you write 435 billion in scientific notation?
  
• How do you find all the real and complex roots of #125x^3 + 343 = 0#?
  
• Question #e3b02
  
• How many light years away is Mars from earth?
  
• How do you solve # x/(x-2) - 2/(x-2)= - 2#?
  
• What is the Castor's distance from the sun? What is the diameter of the castor star? How far away from the earth is it? How far away is the castor star from the moon?
  
• Question #ade40
  
• How do you express the quotient of #(3x^2+13x+4)/((3x+1)/5)# in simplest form?
  
• Question #0c7a7
  
• Question #14558
  
• How do you solve for k in #d + 3 = sqrt(2k – 5)#?
  
• How do you factor #2pqrs + 14q^(2)rs - 49qrs#?
  
• Question #daf3a
  
• If 1.000 US Dollars is equivalent to 0.8610 European euros, how do you convert $16,000 to euros?
  
• How do you simplify #( 9 / 49) ^ (- 3 / 2)#?
  
• How do you solve the following system?: # x+y=4, 2x -5y=7 #
  
• What is #5^21 * 4^11 -: 2#?
  
• What is the molarity if you dissolve 15 g of #FeCl_3# to make up 250 mL solution?
  
• How do you find the limit of #f(x) = (x^2 + x - 6) / (x + 3) # as x approaches 0?
  
• Question #86887
  
• What are the structural isomers for #C_5H_10#?
  
• How do you simplify #2/sqrt(-24)#?
  
• How would you simplify #sqrt 2 div sqrt6#?
  
• How do you simplify #-12÷-2#?
  
• How do you change 5.20 molecules of #C_3H_6O_2# to grams?
  
• Why can't astronomers measure the parallax of a star that is a million light-years away?
  
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