Answers edited by Evan

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• In a two-digit number, the square of the units digit is greater than the tens digit by 2. The sum of the number and the number formed by reversing its digits is 110. What is the two-digit number? Solve using simultaneous equation.
  
• The variables x and y vary inversely. How do you write an equation that relates x and y given x = 15, y = 5?
  
• The length of a rectangle is 4 times its width x. If the rectangle is inscribed in a circle, how do you determine the area of the circle as a function of x?
  
• How do you simplify # (4 times 10^8)^-2#?
  
• How do you round 0.013946 to three significant figures?
  
• How do you solve the equation #x^2-8x=-9# by completing the square?
  
• Simplify #(n!)/((n+1)!)-((n-1)!)/(n!)#?
  
• Functions, Help?
  
• Dave has 3 times as many sweets as Will. Debbie has 3 sweets less than Dave. Together, they have 53 sweets. What is the simplest ratio between the number of sweets that Will has to the number that Dave has to the number that Debbie has?
  
• Explain how water moves up a plant via transpiration?
  
• How do you convert repeating decimals into fractions?
  
• Is y=2x-9 a direct variation and if so, what is the constant?
  
• What are the stationary points of #y=x^3/(1-x^2)#?
  
• How many moles of helium is present in 10g of helium?
  
• What is the the value of a? Also, prove the following:
  
• How do you combine #\frac { 1} { x - 3} + \frac { 1} { ( x - 3) ^ { 2} } - \frac { 1} { ( x - 3) ^ { 3} }# into one term?
  
• A Pacific salmon can swim at a maximum speed of 8 mi/h. The function #y =8x # describes how many miles #y# the fish swims in #x# hours. What is the number of miles the fish swims in 3.5 hours?
  
• What benefit do fossils provide humans?
  
• Evaluate the indefinite integral:∫sqrt(10x−x^2)dx ?
  
• What are the stimuli that turn on and off the thirst center?
  
• How do you solve #sqrt(4x+1)+3=0#?
  
• How do you express the number #7,832,940,065# in English?
  
• If you got 3 wrong out of 35 possible answers what would be the percentage?
  
• You open a deposit account that pays 2.75% annual interest compounded monthly. There was an opening deposit of $500 and further deposits of $500 at the beginning all the following months. ?
  
• Is the sequence - 1,6,-36,216 geometric?
  
• A belt is fitted tightly around two wheels of radii #20 cm# & #5 cm# which are #5 cm# apart. How do you show that the length of the belt is #30(pi + sqrt3) cm#?
  
• How do you write these numbers in order from least to greatest: 6.139, 6.38, 6.3, 6.319?
  
• Is 193 a perfect square?
  
• A car that cost $6100 was sold 2 years later at a 3% loss. How much did it sell for?
  
• Evaluate #int_0^1 (t/(1+t^3))dt#?
  
• If #y# varies inversely with #x#, and if #y=10# when #x=1.2#, what is the value of #x# when #y=30#?
  
• Solve for #x# in #|2x-4| >= -5#? Why doesn't the usual method work in this case?
  
• I need help to Show an equation that relates the House Price, P to the square footage, #ft^2#, and then use this equation to predict the price of a #20,200 ft^2# house?
  
• How do you find the intercepts for #4x+3y=8#?
  
• Why does a reaction with nitric acid produce nitrogen gas?
  
• During external respiration, are gases exchanged between the outside air and the alveoli, the alveoli and the blood, the blood and cells, the outside air and blood in the dermis, or the cytosol and mitochondria?
  
• The length of a rectangle is 8cm greater than its width. How do you find the dimensions of the rectangle if its area is 105cm²?
  
• #y=x/(x^2+1)#, find maxima and minima?
  
• Integration of sqrt 1+x^4 dx=?
  
• How come on my "thank you notes" that some people sent it from e.g 'someone from San Francisco, America" and then some people have their names attached to it? I hope my question makes sense
  
• What are the points of inflection of #f(x)=(3x^2 + 8x + 5)/(4-x) #?
  
• What are the roots of the equation #x^2-5x+1=0#?
  
• I need help to Show an equation that relates the House Price, P to the square footage, #ft^2#, and then use this equation to predict the price of a #20,200 ft^2# house?
  
• Solve for #x# and #y#, given that #x+8y=160# and #3x+5y=119#?
  
• What is separating a solid from a liquid by evaporating the liquid called?
  
• The most commonly used skin antiseptic, rubbing alcohol, is how many percent alcohol?
  
• What are the points of inflection of #f(x)= (x^2 - 8)/(x^2+3) #?
  
• How do you multiply #(4a ^ { 3} ) ( 2a ^ { 2} )#?
  
• If Ajay gives Vijay ₹5, Ajay would have twice as much as Vijay. If Vijay gives Ajay ₹15, Ajay would have 8 times as much as Vijay. How much does Ajay have?
  
• How do you solve #x^2 + 10x + 13 = 0# by completing the square?
  
• Is phenol more acidic than acetylene?
  
• What is the smallest perimeter possible for a rectangle of area 16 in^2?
  
• Using a straight edge and compass construct The perpendicular bisector of FG ?
  
• How do you factor #x^9 - x^6 - x^3 + 1#?
  
• How to do 191st question?
  
• How do i solve this?
  
• Rationalize #(sqrt(6) + sqrt(5))/(sqrt(5) - sqrt(3))#?
  
• Find all real numbers of #s# such that #-2(s - 7) > 4s + 8#. Give your answer in interval notation?
  
• From the word 'propriety', how do you find all the possible words / different arrangements of all the letters? (answer is 90720)
  
• What are concussions a form of?
  
• #cot765^@ = #? #sec765^@ = #? #csc765^@ = #?
  
• How do you combine #11/(5x)-1/(5x)#?
  
• For which t-values does the system have none, one or infinite solutions? #4(t+4)x+21y=56 ;color(white)("dd")12x+3ty=24#
  
• What is the slope and y-intercept of this line y = x – 3?
  
• Kate has a balance of $ 1,080 on her credit card. If she makes no purchases and pays $ 90 each month, will her credit card balance be payed off in a year? Explain.
  
• Find the maxima and minima of function:- #y=2x^3-9x^2-24x+15#?
  
• Assume y varies inversely as x, how do you write the equation given y=-4 when x=-3?
  
• What are the definition of the three types of chemical reactions?
  
• How do you solve #abs(x+17)+10=70#?
  
• What is the Square Root of -12?
  
• Who were the kulaks?
  
• Four times the sum of a number and 9 is equal to 7?
  
• ABCD is a parallelogram. Prove that AC and PQ bisect each other.?
  
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