Jeffrey owes his friend $5. How much is Jeffrey’s debt?

Mathematics

2 answers:

worty [1.4K]3 years ago

8 0

Answer:

Step-by-step explanation:

These exercises are about calculating the magnitude of quantities, and for this we use the absolute value. The absolute value or modulus of x, defined as |x|, of a number x is value of x regardless to its sign. This means we will have |x| = x if x is positive, and |x| = −x if x is negative, so our result will be always positive.

Jeffrey’s debt is then |$5|=$5

creativ13 [48]3 years ago

3 0

Jeffery owes his friend $5

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77julia77 [94]

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The equation C = 5 9 F − 160 9 gives the relation between temperature readings in Celsius and Fahrenheit.

Pavel [41]

Step-by-step explanation:

The question is wrong. The correct equation is :

$C=\frac{5}{9}F-\frac{160}{9}$

We know that the equation gives the relation between temperature readings in Celsius and Fahrenheit.

Therefore, giving that we know the value in Fahrenheit ''F'' we can find the reading in Celsius ''C''. This define a function C(F) that depends of the variable ''F''.

So for the incise (a) we answer Yes, C is a function of F.

For (b) we need to find the mathematical domain of this function. Giving that we haven't got any mathematical restriction, the mathematical domain of the function are all real numbers.

Dom (C) = ( - ∞ , + ∞)

For (c) we know that the water in liquid state and at normal atmospheric pressure exists between 0 and 100 Celsius.

Therefore the range will be

Rang (C) = (0,100)

Now, we need to find the domain for this range. We do this by equaliting and finding the value for the variable ''F'' :

For C = 0 :

$0=\frac{5}{9}F-\frac{160}{9}$ ⇒ $F=32$