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Lesechka [4]
3 years ago
13

Sketch the graph of y = 4 x squared + 32 x + 15 using your graphing calculator. What are the x-intercepts of this graph? a. (-5,

0) and (3.5, 0) c. There are no y-intercepts b. (-2.5, 0) and (-2, 0) d. (-0.5, 0) and (-7.5, 0) Please select the best answer from the choices provided A B C D
Chemistry
2 answers:
quester [9]3 years ago
8 0

Answer:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    4*x^2-32*x-(-15)=0

Explanation:

tensa zangetsu [6.8K]3 years ago
7 0

Answer: d.) x= -7.5 x= -0.5

Explanation: correct on edge 2021

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3 years ago
An iron bar of mass 841 g cools from 84°C to 7°C. Calculate the heat released (in kilojoules) by the metal.
Oduvanchick [21]

Answer:

28.75211 kj

Explanation:

Given data:

Mass of iron bar = 841 g

Initial temperature = 84°C

Final temperature = 7°C

Heat released = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

specific heat capacity of iron is 0.444 j/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

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ΔT = -77°C

By putting values,

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Q = 28752.11 j

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