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Soloha48 [4]
3 years ago
10

6. The temperature of an iron block decreases from 85°C to 25°C. If the mass for

Mathematics
1 answer:
Fittoniya [83]3 years ago
4 0

Answer:

8280 cal

Step-by-step explanation:

Q=mc(delta)T

Q=1200(0.115)(-60)

Q=8280 cal

I used 1200 g instead of 1.2 kg

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3(x+2)^2+7 in standard form
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Answer:-2x^2+3x-7=0

Step-by-step explanation:

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3 years ago
which of the following is the missing reason? Statements Reasons three halves times x plus 5 equals negative 4 Given 3x + 10 = −
den301095 [7]

Answer:

The missing reason is Subtraction Property of Equality.

Step-by-step explanation:

\frac{3}{2}x+5=-4    ⇒ (Given)

On Solving we get;

Multiplying 2 on both side we get;

2(\frac{3}{2}x+5)=-4\times2\\\\2\times \frac{3}{2}x+5\times 2=-4\times 2

3x+10=-8   ⇒ (Multiplication Property of Equality)

Now Subtracting Both side by 10 we get;

3x+10-10=-8-10

3x = -18     ⇒ (Subtraction Property of Equality)

Now Dividing both side by 3 we get;

\frac{3x}{3} = \frac{-18}{3}

x=-6        ⇒ (Division Property of Equality)

Hence the missing reason is Subtraction Property of Equality.

8 0
3 years ago
Read 2 more answers
Please help!<br><br>4^x*5^y=20, 4^y*5^x=20^2, x+y=?​
photoshop1234 [79]

Answer:

x + y are either 2 or 4

Step-by-step explanation:

conclusion x + y = 2 OR 4

7 0
3 years ago
Bob drove 864 miles in 12 hours. At the same rate, how long would it take him to drive 648 miles? ​
MariettaO [177]
It will take 12*648/864=9 hours
3 0
3 years ago
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Answer:

8

Step-by-step explanation:

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8 0
3 years ago
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