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Jui
Help with the substitution method?
Solve the first equation in the system for y:
2x+y=1
3x+2y=0
Solve for x:
Solution: (x, y)
While the answer would be helpful, I am most looking for a step by step explanation on how to solve this, and similar equations. I initially multiplied the first equation by 2 (to convert the y into 2y) but that didn't seem to work out. Where did I go wrong? Does it matter whether or not you try to eliminate the x or y variables?
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Discuss the differences between the measurement of the surface area and the measurement of the volume of a right rectangular prism. Include the following topics in your discussion.
(a) Description of regions that are measured:
(b) Units for each type of measure and why the units are different:
(c) Examples of when you would want to measure for each type of measure Answer:
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The answer is 9.34 but I am unsure as to how to solve this.
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A man is parasailing above a lake at an angle of elevation of 32° from a boat. If 129.5 meters of line connects the boat to the parasail. How many meters above the lake is the man to the nearest tenth of a meter?
A) 68.6 m
B) 80.9 m
C) 109.8 m
D) 152.7 m
1 AnswerMathematics2 years agoHelp with 3 chemistry questions?
The enthalpy of the reactants is greater than that of the products
The enthalpy of the products is greater than that of the reactans
They are equal
2.) Which of the following is an endothermic reaction?
condensation of steam
thawing ice
freezing water
an explosion
3.)Which of the following statements is true?
-In an exothermic reaction, the energy of the products is the same as the energy of the reactants
- In an exothermic reaction, the energy of the products is greater than the energy of the reactants
-In an endothermic reaction, the energy of the products is the greater than the energy of the reactants
In an endothermic reaction, the energy of the products is the same as the energy of the reactants
1 AnswerChemistry2 years agoHelp with 2 chemistry questions?
1.) Photo
2.) How much heat is given off when 32g liquid methanol (CH3OH) at its freezing point changes to solid methanol? (methanol Hf=3.16 kJ/mol)
3.16 kJ
1.58 kJ
0.79 kJ
0.18 kJ
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The highlighted answer is the correct one but I initially thought it was CEF. How is this the answer and what exactly is a chord?
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I'm confused what I'm doing wrong but I even tried Google and it gave me 904.78.
How do I find this?
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