Questions asked by Ivy Liu
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Find z (floor). Look at picture! Please?
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Find z (floor). Please? Add work and explanation.
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Find N? Please add work and explanation!
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What is the smallest positive integer n?
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Find the number of pairs of integers (x,y)?
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Find the amount of heat energy needed to convert 150 grams of ice at -15°C to ice at -63°C?
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Find the amount of heat energy needed to convert 400 grams of ice at -38°C to steam at 160°C?
1284440 Joules
246840 Joules
331056 Joules
159984 Joules
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What is the value of a^2+b^2?
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Find all ordered pairs of real numbers (x, y) such that x^2y^2 + 2xy^2 + 5x^2 + 3y^2 + 10x + 5 = 0?
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Let r, s, and t be the roots of the equation x^3 - 2x + 1 = 0 in some order. What is the maximal value of r^3 - s- t?
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Use this equation to find the equilibrium constant?
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What is trichotillomania?
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Show that if a+b...........?
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Determine the minimum value of a/(2b) + b/(4c) + c/(8a) where a,b,c are positive real numbers?
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Where is the activation complex? IN PICTURE
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Factor 4x^3 - 9x^2 + 6x + 1?
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If x and y are positive numbers, what is the minimum possible value of (x+y)(1/x + 1/y) ?
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What is a and b and c on this graph?
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An equilibrium constant of 900 indicates?
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Which would not be affected by the addition of a catalyst?
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The reaction of charcoal (carbon) and oxygen is sped up by grinding the charcoal into a fine powder. This is an example of?
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If A, B, C and D are positive numbers such that A + 2B + 3C + 4D = 8, then what is the maximum value of ABCD?
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Suppose 0< a,b,c < 1 and ab + bc + ca = 1. Find the minimum value of a + b + c + abc?
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Find the smallest integer n?
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Label each element with an oxidation number?
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Find the maximum value of 2x + 2sqrt{x(1-x)} when 0 \leq x \leq 1?
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Prove that
\sqrt{ \frac{2x^2 - 2x + 1}{2} } \geq \frac{1}{x + \frac{1}{x}}for 0 < x < 1. ?
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What chemical is oxidized in the following reaction?
Mg + 2HCl → MgCl2 + H2
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Assume that
1a_1+2a_2+\cdots+na_n=1,
where the a_j are real numbers.
As a function of n, what is the minimum value of
1a_1^2+2a_2^2+\cdots+na_n^2?
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Let x, y, and z be real numbers such that x^2 + y^2 + z^2 = 1. Find the maximum value of 9x+12y+8z.?
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For x,y, and z positive real numbers, what is the maximum possible value for
\sqrt{\frac{3x+4y}{6x+5y+4z}}
+
\sqrt{\frac{y+2z}{6x+5y+4z}}
+
\sqrt{\frac{2z+3x}{6x+5y+4z}}?
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Double Replacement Reactions: Complete and balance. Identify the precipitate (highlight it!!)?
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If f(a + b) = f(a) + f(b) - 2f(ab) for all nonnegative integers a and b, and f(1) = 1, compute f(1986).
???????
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Reaction Prediction?
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Use the solubility curve?
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Thermochemistry?
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Given the reaction: NaOH(s) + H_2O(l) -> Na^"+"(aq) + OH^"-" (aq) + 10.6 kJ, the heat of reaction, ΔH, is (positive/negative), the entropy, ΔS, is (positive/negative) and the reaction is (spontaneous/not spontaneous).
Thermochem?
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If the equilibrium constant (K) = 100, this reaction favors the (reactants/products) and proceeds (very little/almost to completion).
Equilibrium?
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If 20 mL of 1.0 M HCl is used completely to neutralize 40 mL of an NaOH solution, what is the molarity of the NaOH solution?
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The function f satisfies
f(x) + f(2x + y) + 5xy = f(3x - y) + 2x^2 + 1for all real numbers x, y. Determine the value of f(10).
???
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Suppose that x>0 we have f(2x)= 5/(2+x). What is 2f(x)?
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The function f(x) is defined for every positive integer x and satisfies the equation f(x+y) = f(x)f(y) - f(xy) + 1 for all positive integers x and y. If f(1) =2, find f(x)?
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Find all functions f: Z -> Z such that f(a + b) = f(a) f(b) + f(b) for all a,b, and f(1) = k-1, where k is some integer greater than 1?
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Suppose that x>0 we have f(2x)= 5/(2+x). What is 2f(x)?
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For every pair of numbers a and b, the function f satisfies b^2 f(a) = a^2 f(b). If f(2) does not equal 0, find the value of [f(5) - f(1)] / f(2)?
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Find all functions f : R \ {-1} -> R such that [f(x)f(z)]/[y+1] = [f(y)f(z)]/[x+1] whenever x,y and z do not equal -1?
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Let f(t) = [t+ sqrt(3)]/[1 - tsqrt(3)]. Prove that f is a cyclic function?
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The function f : RR -> RR satisfies xf(x) + f(1 - x) = x^3 - x for all real x. Find f(x)?
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Suppose that f ( x ) and g ( x ) are functions which satisfy f ( g ( x ) ) = x^2 and g ( f ( x ) ) = x^3 for all x ≥ 1 . If g ( 16 ) = 16 , then compute log_2 g ( 4 ) . (You may assume that f ( x ) ≥ 1 and g ( x ) ≥ 1 for all x ≥ 1 .)?
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Suppose we have the following identity:
(px + (1-p)y)^2 = Ax^2 + Bxy + Cy^2.
Find the minimum of max(A,B,C) over 0 leq p leq 1?
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If y = x + 1/x, then write the equation x^4 + x^3 -4x^2 +x +1 = 0 in terms of y?
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Find all order pairs (x,y) such that 2x^4 +5x^3 y +45xy^3 = 34x^2 y^2 + 18y^4 and 2x - 3y =7?
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Find all solutions to the equation 7^2a = 45(7^a) + 4 (7^2)?
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If a and b are integers such that x^2 -x-1 is a factor of ax^3 + bx^2 +1, then find b?
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Let p(x) be a fourth degree polynomial with a leading coefficent 2 such that p(-2) = 34, p(-1) = 10, p(1) = 10, and p(2) = 34. Find p(0)???
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Solve for all complex numbers z such that z^4 + 4z^2 + 6 = z?
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Let f(m,1) = f(1,n) = 1 for m geq 1, n geq 1, and let $f(m,n) = f(m-1,n) + f(m,n-1) +... ?
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Compute 1/[r-1] + 1/[s-1] + 1/[t-1] given that r,s and t are the rootes of x^3 -2x^2 +3x -4 = 0?
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Let p(x) be a degree 2 polynomial such that p(1) = 1, p(2) =3, amd p(3) = 2. The p(p(x)) =x has four real solutions. Find the only such solution that is not an integer?
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Find all a, b such that a^2 9^b = 4 and a/3^b =18?
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Find an equation whose graph is a parabola with directrix y= -1 and vertex (1,3)?
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Find an equation whose graph is a horizontally opening parabola that passes through (20, -3), (12,1), and (33,-2)?
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Find the vertex, axis of symmetry, and graph the parabola?
x = 5y^2 -20y +23
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Find the equation, center, foci, and the lengths of the major & minor axes from x^2 +2y^2 -12y +4x+2=0?
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A chord of a circle is a line segment whose endpoints are on the circle. Find the length of the common chord of the two circles whose equations are x^2 + y^2 =4 and x^2 +y^2 -6x +2 = 0?
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The lactus rectum of a parabola is a line segment passing through the focus of the parabola......?
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Find axis of symmetry and vertex of x=5y^2 -20y +23?
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Factor 9a^5 -4a^3 -81a^2 +36 completely over the
a) intergers c) reals
b) rationals d) complex numbers ??
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Find all ordered pairs (x,y) such that x-xy^3 =7 and xy^2 -xy =3?
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Factor each of the following as completely as possible over the reals?
a) a^3 (c-b) + b^3 (a-c) + c^3 (b-a)
b) a^4 (c-b) + b^4 (a-c) + c^4 (b-a)
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Find 2 positive integers greater than 1 whose product is 6^6 + 8^4 + 27^4?
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Simplify the expression below?
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Put the following statements in the correct order for the events of the sliding filament theory?
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Solve 4sin^2(x) -3 = 0 for [0,2pi)????
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Vector addition?? Please see below!
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Put the following statements in order?
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Determine the angle between c= <5, -4> and d= <12, 7>. Please use right triangles!?
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Schedules of reinforcement?
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Parametric equation problem?
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Polar coordinates?
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Parametric?
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Which of the following is NOT the same point in polar coordinates as (3, -1.236)?
(-3, 1.906)
(3, -7.518)
(3, 5.047)
(-3, 1.236)
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To estimate the size of a lake, Leah starts at one end of the lake and walks 90 meters. Then, she turns 100 degrees and walks another 84 meters to the end of the lake. Please draw a diagram of this situation. Also, how long is the lake?