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Zielflug [23.3K]
4 years ago
11

For a scientific Experiment, A physicist must make sure that the temperature of a metal at 0°C get to no colder then -80°C. the

physicist changes the metals temperature at a steady rate of -4°C per hour.for how long can the physicist change the temperature
Mathematics
1 answer:
shepuryov [24]4 years ago
8 0
80 divided by 4=20. ANSWER is 20 hours
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After substituting, what is the first step when evaluating 4y+9/7 when y=8
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Answer:

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Step-by-step explanation:

After substituting, the expression is ...

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The order of operations tells you to do multiplication and division before addition and subtraction. You do them left-to-right. The multiplication on the left is 4·8, so you do that first. The result is ...

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Now, you can do the division:

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And, finally, the addition:

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Or, you could skip the division and go straight to adding a whole number and a fraction:

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