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3 years ago

Original Price Of A Sled: $99.50

Mathematics

2 answers:

likoan [24]3 years ago

3 0

49.75

50%=.50
99.50 x .50 = 49.75

DochEvi [55]3 years ago

3 0

So, the original price is $99.50 and we want to see the discounted price.
Do: 99.50 times .5 to get the discounted price.
The discounted price would be 49.75.

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Hunter-Best [27]

Answer:

After 15 minutes, the temperature of both the furnaces will be same.

Step-by-step explanation:

Let $x$ be the minutes when the temperature of both becomes same.

Now, as per question:

Temperature of the furnace after $x$ minutes that is cooling at the rate of 15 degree per minute is given as:

$T=1200-15x$

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Now, equating both the temperatures, we get

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3 years ago

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Use substitution to solve the following system of equations. What is the value of y? {3x+2y=12{5x−y=7 A) y = -3B) y = 3C) y = -2

Vlad [161]

Answer

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Step-by-step explanation

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$\begin{gathered} 3x+2y=12\text{ \lparen eq. 1\rparen} \\ 5x-y=7\text{ \lparen eq. 2\rparen} \end{gathered}$

Isolating x from equation 1:

$\begin{gathered} 3x+2y-2y=12-2y \\ 3x=12-2y \\ \frac{3x}{3}=\frac{12-2y}{3} \\ x=\frac{12}{3}-\frac{2}{3}y \\ x=4-\frac{2}{3}y\text{ \lparen eq. 3\rparen} \end{gathered}$

Substituting equation 3 into equation 2 and solving for y:

$\begin{gathered} 5(4-\frac{2}{3}y)-y=7 \\ 5\cdot4-5\cdot\frac{2}{3}y-y=7 \\ 20-\frac{10}{3}y-y=7 \\ 20-\frac{13}{3}y=7 \\ 20-\frac{13}{3}y-20=7-20 \\ -\frac{13}{3}y=-13 \\ (-\frac{3}{13})\cdot-\frac{13}{3}y=(-\frac{3}{13})\cdot-13 \\ y=3 \end{gathered}$

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