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4 years ago

15 decreased by twice a number algebraic expression?

Mathematics

2 answers:

Reil [10]4 years ago

5 0

$x-\ number\\\\twice\ a\ number:\\2x \\\\ Write\ it\ as\ a \ function: \\y=15-2x$

labwork [276]4 years ago

4 0

15-2x
A number is a variable so use a letter like x for them

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Water boils at 100LaTeX: ^\circ∘ Celsius or 212LaTeX: ^\circ∘ Fahrenheit. Water freezes at 0LaTeX: ^\circ∘ Celsius or 32LaTeX: ^

Lubov Fominskaja [6]

Answer:

$F = 1.8C +32$

$F = 86^{\circ}F$

Step-by-step explanation:

Represent Celsius with C and Fahrenheit with F.

So, we have:

$(C_1,F_1) = (100,212)$

$(C_2,F_2) = (0,32)$

Solving (a): Represent as a linear equation

First, we calculate the slope:

$m = \frac{F_2 - F_1}{C_2 - C_1}$

This gives:

$m = \frac{32 - 212}{0 - 100}$

$m = \frac{-180}{- 100}$

$m = 1.8$

The linear equation is then calculated using:

$F - F_1 = m(C -C_1)$

Where

$(C_1,F_1) = (100,212)$

$m = 1.8$

$F - 212 = 1.8(C -100)$

$F - 212 = 1.8C -180$

Make F the subject

$F = 1.8C -180+212$

$F = 1.8C +32$

Solving (b): The value of F when C = 30

Substitute 30 for C in $F = 1.8C +32$

$F = 1.8 * 30 + 32$

$F = 54 + 32$

$F = 86$

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3 years ago

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NemiM [27]

9 is c-point L
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4 years ago

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BartSMP [9]

Answer:

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Step-by-step explanation:

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Answer:

Answer is given below with explanations.,

Step-by-step explanation:

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THANKS FOR GIVING ME THE OPPORTUNITY TO ANSWER YOUR QUESTION.

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3 years ago

Find the slope of each graph. Express the answer in simplest form.help

Licemer1 [7]

Answer:

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Step-by-step explanation:

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