02/24/23

I want to convert this matrix in a row echelon form but got stuck. Can someone tell me the steps of the row echelon form for this matrix?
A =2 6 3 12 1 0 −23 −2 1 10 6 2 0
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02/23/23

find dy/dx 3x^2y^2-5sin(xy) +7x =25y+2
Find dy/dx of the function
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02/23/23

How can this Chemistry problem be solved?
Calculate the kilojoules needed to heat 175 g of copper from 82. ∘F to 347 ∘F. The specific heat of Copper is 0.0920 cal/g °C and 0.385 J/ g °C. Give your answer in the correct number of... more
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02/22/23

I need help with my stoichiometry chemistry homework

C3Hg +502 - 3C02 + 4H20Carbon dioxide will be released from the burning of propane. Given 4.59 moles of propane and 3.85 moles of oxygen, use the equation to determine the limiting reactant, excess... more
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02/22/23

At the beginning of an experiment, a scientist has 128 grams of radioactive goo. After 165 minutes, her sample has decayed to 2 grams.
What is the half-life of the goo in minutes?Find a formula for G(t), the amount of goo remaining at time t G(t)? How many grams of goo will remain after 8 minutes?
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02/21/23

Write a rule for g.
Let the graph of g​ be a horizontal stretch by a factor of 4, followed by a translation 3 units right and 5 units down of the graph of f(x)=x^5+3x
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02/21/23

A 5.410 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is 𝜇s=0.455 and the coefficient of kinetic friction is 𝜇k=0.205. At time 𝑡=0, a For
A 5.410 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is 𝜇s=0.455 and the coefficient of kinetic friction is 𝜇k=0.205. At time 𝑡=0, a... more
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02/21/23

Collisions (physics)
A 1905-kg railway freight car coasts at 4.8 m/s underneath a grain terminal, which dumps grain directly down into the freight car. If the speed of the loaded freight car must not go below 2.6 m/s,... more
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02/21/23

Radioactivity and half life
If a tree dies and the trunk remains undisturbed for 1.685 × 10⁴ years, what percentage of the original ¹⁴C is still present? (The half-life of ¹⁴C is 5730 years.)
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02/20/23

arithmetic sequence
a3=46, a5=49Find the general term, an an , for the following arithmetic sequence.
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02/19/23

1) Let f(x) = -2x + 1 : x > 2, -2x^2 + 5 : -1 < x ≤ 2, -4x - 5 : x ≤ -1.

(1) Letf(x) = -2x + 1 x > 2-2x^2 + 5 -1 < x ≤ 2-4x - 5 x ≤ -1.(a) Graph f(x).(b) State all points where f(x) is discontinuous and why.(c) For which of the points found in part (a),... more
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02/19/23

9 less than 5 times z
algebric expressions
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02/18/23

Chemistry HW help
How many milliliters of 0.100 M HCIO3 are required to neutralize 39.4 mL of 0.140 M KOH?
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02/17/23

Given the function value and the quadrant​ restriction, find theta
cosθ=-0.8910interval: (90°,180°)
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02/17/23

Which of the following (with specific heat capacity provided) would require the most energy to increase temperature by 1 oC?

Which of the following (with specific heat capacity provided) would require the most energy to increase temperature by 1 oC? Group of answer choicesA: 1.0 g Si(s) (Cs = 0.712 J/g oC)B: 1.0 g Ar(g)... more
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02/17/23

Troubling question
Given a balanced chemical equation between H2SO4(aq) and KOH(aq)   H2SO4(aq) + 2 KOH(aq) → K2SO4(aq) + 2 H2O(l)What volume (in mL) of 0.5 M H2SO4(aq) solution is necessary to completely react with... more
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02/14/23

Pre-calculus math
Find the exact value of the expression. Sin(cos^-1(3/4)-tan^-1(1/3))
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02/14/23

Evaluate the integral of 2 raised to the power of 3 times x, dx.
    None of these
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02/14/23

2. Find the open intervals on which f(x) = 1/(x^2) is increasing or decreasing.
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02/14/23

Consider the line y=6x-1 Find the equation of the line that is perpendicular to this line and passes through the point (2,-2). Find the equation of the line that is parallel to this line and pass...
Consider the line y=6x-1Find the equation of the line that is perpendicular to this line and passes through the point (2,-2).Find the equation of the line that is parallel to this line and passes... more
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02/14/23

What is the principle value of
I really don't get this. Please provide explanation/step-by-step.
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02/13/23

help me to ansers this questionn please

Use the limit definition of the derivative to find the slope of the tangent line to the curve f(x)=5x2+2x+4 at x=2
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02/13/23

Find f(a + h) - f(a) for the function. Simplify your answer.
f (x)+x^2-11x+1
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02/13/23

Finding the slope of a line
I am trying to help my daughter do her calculus homework. It's been 30 years since I did this stuff, so it's greek to me. Any help would be appreciated.suppose f(x)=14-x^2. find the slope of the... more
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02/13/23

Trigonometry help
If tan(θ)=85 , where 0≤θ≤2π. Largest positive value of θ
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