Answers created by Olivier B.

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• How do you solve the following system?: #2x-13y= 9 , 17 x + 2y = 6 #
  
• Question #acc87
  
• A pyramid has a parallelogram shaped base and a peak directly above its center. Its base's sides have lengths of #2 # and #8 # and the pyramid's height is #2 #. If one of the base's corners has an angle of #(5pi)/6#, what is the pyramid's surface area?
  
• The larger of two number is 10 less than twice the smaller number. If the sum of the two numbers is 38, what are the two numbers?
  
• Ariel has 19 more CDs than her sister Tiffany has. victor has 3 times as many CDs as Ariel has. Which expression can be used to show how many CDs the three have in total?
  
• When a star enters the red giant stage what does it begins to convert in its core?
  
• How do you calculate #log_4 43# with a calculator?
  
• A coin bank has 250 coins, dimes and quarters, worth $39.25. How many of each type of coin are there?
  
• What is the instantaneous velocity of an object moving in accordance to # f(t)= (t^2,tcos(t-(5pi)/4)) # at # t=(pi)/3 #?
  
• What is the distance between the following polar coordinates?: # (3,(23pi)/12), (7,(13pi)/8) #
  
• What is the conjugate of the complex number 10 + 3i?
  
• Question #49be6
  
• Question #01f74
  
• A car moves with a speed of 80 m/s. If the driver used the brakes to decrease the speed, so it decreases by 2 m/sec^2. What is its speed after 12 seconds from using the brakes?
  
• How do you simplify square root 125 + square root 1/5 - square root 49/5?
  
• The water level in a hemispherical bowl of radius 12 inches is 4.6 inches. What angle can you tilt the bowl before the water begins to spill?
  
• Question #fb05f
  
• Question #dcd68
  
• The sum of two numbers is 180 and the larger number exceeds four times the smaller number by ten, what are the 2 numbers?
  
• Attendance at the homecoming game decreased from 5760 fans last year to 4320 fans this year. How do you find the percent of decrease?
  
• How do you simplify #2x-4x+2#?
  
• Question #de828
  
• A merchant has 5 pounds of mixed nuts that cost $30. He wants to add peanuts that cost $1.50 per pound and cashews that cost $4.50 per pound to obtain 50 pounds of a mixture that costs $2.90 per pound. How many pounds of peanuts are needed?
  
• How do you graph #8(x-5)=(y-3)^2#?
  
• A chemist mixes a 200 L of a solution that is 60% acid with a 300 L of a solution that is 20% acid. What is the percentage of the mixture?
  
• How do you differentiate #f(x)= 2x*sinx*cosx#?
  
• How do you convert the Cartesian coordinates (10,10) to polar coordinates?
  
• How do you solve #ln 2x = -8#?
  
• Question #03b84
  
• How do you graph #f(x) =abs(3x-6)#?
  
• How can you evaluate #(4a-2)/(3a+12) - (a-2)/(a+4) #?
  
• How do you calculate the value of the integral #inte^(4t²-t) dt# from #[3,x]#?
  
• How do use the first derivative test to determine the local extrema #y = sin x cos x#?
  
• How do you solve d + q = 31 and 10d + 25q=5.95?
  
• How do you express as a single logarithm & simplify #(1/2)log_a *x + 4log_a *y - 3log_a *x#?
  
• How do you graph #y=2x#?
  
• How do you simplify #10x^2(x+5)/3 * 9/(2x)#?
  
• How do you find the slope of the line through the following pairs of points (2,-1/2) and (5, 3/2)?
  
• What is the derivative of #y=(x/e^x)LnX#?
  
• How do you find the instantaneous rate of change of #f(x)=x^2-2/x+4# at #x=-1#?
  
• How do you differentiate #y = (x + 7)^10 (x^2 + 2)^7#?
  
• A plane flying horizontally at an altitude of 1 mi and speed of 500mi/hr passes directly over a radar station. How do you find the rate at which the distance from the plane to the station is increasing when it is 2 miles away from the station?
  
• How to use the discriminant to find out how many real number roots an equation has for #9n^2 - 3n - 8= -10#?
  
• During a solar eclipse , the moon , earth , and and sun all lie on the same line,with the moon between earth and sun. what force is exerted by the sun on the moon? what force is exerted by earth on the moon? what force is exerted by the sun on earth
  
• What is the 32nd term of the arithmetic sequence where a1 = -33 and a9 = -121?
  
• A wheel has a radius of 4.1m. How far(path length) does a point on the circumference travel if the wheel is rotated through angles of 30° , 30 rad, and 30 rev, respectively?
  
• Question #5771d
  
• Question #94346
  
• Question #647eb
  
• If y varies directly as x and if x = -6when y = 2 how do you find x when y = -9, -8,-6, -5, -4, -3?
  
• How do you use the second derivative test to find the relative maxima and minima of the given #f(x)= x^4 - (2x^2) + 3#?
  
• How do you solve 4 > -3x + 3 or 8 ≤ -2x + 5?
  
• How do you solve #2abs(3x - 2 ) = 14#?
  
• Suki has started to draw a plan of her bedroom at a scale of 1 : 25. The length of her room is represented by 132mm on the plan. What is the actual length of her room?
  
• How do you solve #sin 3 theta = 1 #?
  
• In the right triangle ABC, angle C equals 90 degrees, if angle B is 63 degrees, what is the measure of angle A?
  
• What is the exact value of #sin 60 - cos 60#?
  
• In 1992, the city of Chicago had 6.5 million people. In 2000 they project Chicago will have 6.6 million people. If Chicago's population grows exponentially, how many people will live in Chicago in 2005?
  
• How do you covert #(5(pi))/7# to degrees?
  
• How do you solve #tanx+sqrt3=0#?
  
• The value of a car decreases at an annual rate of 9.9%. It is currently worth $15000. When will the car be worth $100?
  
• How do you multiply #sqrt (x) * (x)#?
  
• How do you solve by substitution #3x + 2y = 6# and #x + 2y = -6#?
  
• Question #bbf99
  
• Question #d89bc
  
• Question #d3dcb
  
• Question #295c7
  
• Question #37bed
  
• How do you express #cos(4theta)# in terms of #cos(2theta)#?
  
• Andrew claims that a wooden bookend in the shape of a 45°- 45°- 90° right triangle has side lengths of 5 in., 5 in., and 8 in. Is he correct? If so, show the work and if not, show why not.
  
• Why is nuclear fission a chain reaction?
  
• How do you convert 303 degrees to radian?
  
• Question #f472a
  
• For consecutive integers, the sum of the even integers is 60. What is the value of the smallest odd integer?
  
• How do you evaluate #9-15div3(-3)^2+22#?
  
• Let #u(x)=e^(9x)# and #v(x)=5x+9#, how do you find #(v(u(x)))^2#?
  
• How do you find the perimeter of a triangle on a coordinate plane whose points are A (-3, 6), B (-3, 2), C (3, 2)?
  
• How do you find tan x/2 ; given #sin x= 3/5#, with# 90<x<180#?
  
• How do you simplify #5sqrt2 (sqrt8 - sqrt50)#?
  
• How do you find the roots for #x^2 – 14x – 32 = 0#?
  
• Question #06856
  
• How do you graph #y=sqrt(x-1)-3#?
  
• How do you write in standard form #6.36 x 10^-3#?
  
• How do you write 50 thousand in scientific notation?
  
• How do you simplify #sqrt18/sqrt3#?
  
• How do you solve by substitution # x + y = 11# and #x - y = 1#?
  
• How do you find the amplitude, period, and phase shift of #4cos(3theta + 3/2pi) + 2#?
  
• How do you simplify #(sqrt5)^6#?
  
• How do you write with fractional exponents #4(sqrt x^3)#?
  
• How do you add or subtract #(5y)/(1-4y^2 ) - ( 2y)/(2y+1) + (5y)/(4y^2-1)#?