Writing Equations With One Variable
Dontes’s age is 4 less than half of Dominic’s age. Dominic’s age is 6 more than three times Oscar’s age. The sum of their ages is 104. Find the age of each person. I need help with this i know... more
Trigonometry 2 section proof
Prove the identity in a 2 column format. sin2(2x) + 4cos4(x) = 4cos2(x)
URGENT SERIOUS HELP NEEDED
A model rocket is shot out of a building and into the sky. The path of the rocket can be modelled by the equation ℎ = −2(𝑡 − 4)^2 + 50, where h is the height above ground in metres and t is the... more
How many grams of O2 are needed to completely react with 5.0 g of butane in a butane lighter?
I was given the balanced equation: 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O. I have done the conversion to find that 5 g of butane is .09 moles of butane. I am unsure where to start when it comes to the... more
The emission spectrum from atoms and molecules
a. Occurs only in the visible region of the electromagnetic spectrumb. Is a discrete spectrum that is unique to each atom or moleculec. Is a continuous spectrumd. Is a descrete spectrum that is the... more
The value of ni if the observed wavelength is 657 nm is
The value of ni if the observed wavelength is 657 nm isa. 4b. 2c. 5d. 3 I think the answer is b. 2, since 657 nm is part of the Balmer Series (to n=2)
Determine whether the are perpendicular. y=- 2 5 x+5;y= 5 2 x-8 (select )the lines (select )perpendicular .
Write the equation of the line through (0, - 2) and (3, 13) -slope form. The line through (0, - 2) and (3, 13) in point-slope form
Verifying inverse functions
Are they inverse functions?f(x)=3-1/2xg(x)=-2x+6yes or no ?
Precalulus verifying inverse functions
Are these inverse functions? h(x)=10+6x/5f(x)=-2x+5yes or no ?
Find the probability
A bag contains 10 balls, of which 7 are green and 3 are white. A ball is picked atrandom from the bag and its color is noted. The ball is not replaced and a second ballis then picked out. Find the... more
Write the equation of the line in the glven form. the line through (5, - 4) with slope 1/2 In point slope form The equation of the line iS
A woman pushes an initially stationary 11.0 kg gift up a 19.1 degree ramp a distance of 8.09 m.
If she pushes with constant force of 89.7 N and the coefficient of friction is 0.399, what is the final velocity of the gift?
What is the speed of the taxi at the top of a 6.00 m radius loop if the intially at rest start location was 32.4 m above the bottom of the loop?
Write the equation of the line through (0, - 2)(4, 10) point-slope form The line through (0, - 2) and (4, 10) point-slope form is
2M(s)+6HCl(aq)⟶2MCl3(aq)+3H2(g)Δ𝐻1=−947.0 kJ HCl(g)⟶HCl(aq) Δ𝐻2=−74.8 kJ H2(g)+Cl2(g)⟶2HCl(g) Δ𝐻3=−1845.0 kJ MCl3(s)⟶MCl3(aq) Δ𝐻4=−256.0 kJ 2M(s)+3Cl2(g)⟶2MCl3(s)
Consider these reactions, where M represents a generic metal. Use the given information to determine the enthalpy of the reaction
Given the reactions, X(s)+12O2(g)⟶XO(s) Δ𝐻=−641.1 kJ XCO3(s)⟶XO(s)+CO2(g)Δ𝐻=+217.9 kJ what is Δ𝐻 for this reaction? X(s)+12O2(g)+CO2(g)⟶XCO3(s)
Please answer this question.
A biology test is worth 100 points and has 36 questions.a. Multiple-choice questions are worth 2 points each and essay questions are worth 6 points each. How many questions of each type are on the... more
Derivatives of Natural Log
Use the Laws of logarithms to rewrite the expressionin a form with no logarithm of a product, quotient or power.After rewriting we havewith the constant the constant and the constant