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LiRa [457]
2 years ago
6

The length of a cell phone is 8 centimeters to the

Mathematics
2 answers:
igor_vitrenko [27]2 years ago
6 0

Answer:

81 mm is more  precise

Step-by-step explanation:

millimeters are smaller than cm

8 cm * 10 mm/1 cm = 80 mm

compared to 81 mm

81 mm is more  precise

Vlad [161]2 years ago
6 0

Answer:

81 mm

Step-by-step explanation:

mm's are smaller measurements than cm's, and as a result are more precise

1 cm = 10 mm

So 8 cm = 10 * 8 (mm)

              = 80 mm

& 80 mm is smaller than 81 mm, so 81 mm is more precise

Hope this helps, and please mark me brainliest if it does!

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the top one that's orange

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Which rate is equivalent to the unit rate of 15 miles per gallon?
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Sixty miles over four gallons would reduce down to 15 miles over one gallon which would 15 miles per gallon.
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John is going on a trip and the country he is traveling to uses the Celsius scale. He is curious about converting Celsius temper
Setler79 [48]

Answer:

f(x)=\dfrac{9}{5}x+32 converts Celsius to Fahrenheit.

g(x)=\dfrac{5(x-32)}{9} converts Fahrenheit to Celsius.

Step-by-step explanation:

Write given data in the table

\begin{array}{cc}x&f(x)\\^{\circ}\text{C}&^{\circ}\text{F}\\20&68\\30&86\end{array}

Let the expression for the function be

f(x)=ax+b

Note, that this equation is linear equation and it is well-known fact that the Celsius to Fahrenheit dependence is linear.

Substitute corresponding values into this expression:

68=20a+b\\ \\86=30a+b

Subtract these two equations:

86-68=30a-20a\\ \\10a=18\\ \\a=\dfrac{9}{5}

Substitute it into the first equation:

68=20\cdot \dfrac{9}{5}+b\Rightarrow b=68-36=32

So,

f(x)=\dfrac{9}{5}x+32

This is the function which converts Celsius to Fahrenheit.

And function

g(x)=\dfrac{5(x-32)}{9} converts Fahrenheit to Celsius.

4 0
2 years ago
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Tell whether the ordered pair is a solution to the system.
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Answer:

no

Step-by-step explanation:

no. substitute -1 for x and -2 for y.

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this equals -11 not 3

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1 to 8 plz plz plz help me
e-lub [12.9K]

Answer:

1-8 = -7

Step-by-step explanation:

1 - 8

1 0 -1 -2 -3 -4 -5 -6 -7

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