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2 years ago

Pleeeeeeeease helppppppppppppppppp I don't understand

SAT

1 answer:

Darya [45]2 years ago

4 0

Answer: A) -5

Explanation:

$x^{2} -6x+9=(x-3)(x-3)=(x-3)^{2} \\\\f(x)=(x+2)^{2} \\f(x+a)=[(x+a)+2]^{2} =(x+a+2)^{2}\\\\(x+a+2)^{2}=(x-3)^{2}\\x+a+2=x-3\\x-x+a=-2-3\\a=-5$

<em>I think that's how you do it?</em>

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Act soft skills test snswers

scZoUnD [109]

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3 years ago

To the heated water 0.5 kg of water at t3 = 20° c is added. what is the final temperature of the water, in kelvin?

Kay [80]

The final temperature of the water after addition to the heated water at 20° C in degree kelvins' is calculated as; 295.23 K

<h3>What is the Final Temperature?</h3>

We are given;

mass of the initial water; m₁ = 2.5 kg

specific heat capacity of water; c = 4189 J/kg.K

initial temperature of water; T₁ = 13.5 ⁰C

final temperature of the water; T₂ = 22.5 ⁰C

mass of the final water; m₂ = 0.5 kg

initial temperature of the final water; T₁,i = 20 ⁰C

If the system is isolated, then we have;

m₁*c*(T_f - T₂) + m₂*c*(T_f - T₁,i) = 0

c will cancel out to give;

[2.5T_f - (2.5*22.5)] + [0.5T_f - (0.5*20)] = 0

2.5T_f - 56.25 + 0.5T_f - 10 = 0

3T_f = 66.25

T_f = 66.25/3

T_f = 22.08°C = 295.23 K

Read more on final temperature at; brainly.com/question/19169125

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2 years ago

Which factor influencing motivation would be most helpful to excel in sports?

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