Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**mathland****Member**- Registered: 2021-03-25
- Posts: 443

1. A sandwich shop purchases a used

pizza oven for $875. After 5 years, the oven will have

to be discarded and replaced. Write a linear equation

giving the value V of the equipment during the 5 years

it will be in use.

2. Write a linear equation that expresses the relationship between the temperature in degrees Celsius C and degrees Fahrenheit F. Use

the fact that water freezes at 0°C (32°F) and boils at

100°C (212°F).

Question 1

Let t = years

V = 875 + 5t

Correct?

Question 2

I am thinking of the point (Celsius, Fahrenheit).

If so, this yields the following two points:

(0°C, 32°F) & (100°C, 212°F) = (0, 32) & (100, 212).

m = (212 - 32)/(100 - 0)

m = 180/100

I now use the point-slope formula.

y - y_1 = m(x - x_1)

y - 0 = (180/100)(x - 100)

y = (180/100)(x - 180)

Is this correct?

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 33,594

For #2, the relationship between the temperature in degrees Celsius C and degrees Fahrenheit F is :

Celsius to Fahrenheit: (°C × 9/5 ) + 32 = °F

Fahrenheit to Celsius: (°F − 32) × 5/9 = °C.

See the link : Temperture Conversion.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**mathland****Member**- Registered: 2021-03-25
- Posts: 443

ganesh wrote:

For #2, the relationship between the temperature in degrees Celsius C and degrees Fahrenheit F is :

Celsius to Fahrenheit: (°C × 9/5 ) + 32 = °F

Fahrenheit to Celsius: (°F − 32) × 5/9 = °C.See the link : Temperture Conversion.

Very good. Thanks for the link. Those two are familiar weather formulas.

Offline

Pages: **1**