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Mathematics

2 answers:

Kamila [148]3 years ago

7 0

Answer:ok

Step-by-step explanation:

GrogVix [38]3 years ago

3 0

Answer:

Step-by-step explanation:

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-7(-5v-3u 4) use the distributive property to remove the parentheses

Marrrta [24]

Distributeiv poepty
a(b+c)=ab+ac

remember that (-) times (-)=(+)
and (+) TIMES (-)=(-)

SO
<span>-7(-5v-3u+4)=(-7)(-5v)+(-7)(-3u)+(-7)(4)=35v+21u-28</span>

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3 years ago

If you have an email that is stressing you out and you sleep on it before emailing it, you have shown which character trait?

natulia [17]

Answer:

Self-control

Why:

Most people would feel pressured to respond to an email, you are showing self-control by resisting the urge.

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3 years ago

four survivors in a lifeboat have enough water for 12 days. calculate how long the water would have lasted if there had 6 people

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3 years ago

When an amount of heat Q (in kcal) is added to a unit mass (kg) of a

lisov135 [29]

Answer:

The change in temperature per minute for the sample, dT/dt is 71. $\overline {6}$ °C/min

Step-by-step explanation:

The given parameters of the question are;

The specific heat capacity for glass, dQ/dT = 0.18 (kcal/°C)

The heat transfer rate for 1 kg of glass at 20.0 °C, dQ/dt = 12.9 kcal/min

Given that both dQ/dT and dQ/dt are known, we have;

$\dfrac{dQ}{dT} = 0.18 \, (kcal/ ^{\circ} C)$

$\dfrac{dQ}{dt} = 12.9 \, (kcal/ min)$

Therefore, we get;

$\dfrac{\dfrac{dQ}{dt} }{\dfrac{dQ}{dT} } = {\dfrac{dQ}{dt} } \times \dfrac{dT}{dQ} = \dfrac{dT}{dt}$

$\dfrac{dT}{dt} = \dfrac{\dfrac{dQ}{dt} }{\dfrac{dQ}{dT} } = \dfrac{12.9 \, kcal / min }{0.18 \, kcal/ ^{\circ} C } = 71.\overline 6 \, ^{\circ } C/min$