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2 years ago

6

The temperature has been going down at a constant rate. In 3 hours it went down 15 degrees. Which expression best shows the temp

erature change each hour?

2 answers:

Norma-Jean [14]2 years ago

7 0

15/3 = 5 shows the temperature change each hour

Degger [83]2 years ago

6 0

15/3=5
The temperature goes down 5 degrees in 1 hour.

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Please answer this question correctly :)

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2 years ago

A triangle has side lengths measuring 20 cm, 5 cm, and n cm. Which describes the possible values of n?

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The answer is D. 15 < n < 25.

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3 years ago

Read 2 more answers

PLEASE HELP!!! Find the equation , in the standard form of the line passing through the points (3,-4) and (5,1)

ExtremeBDS [4]

$\bf \begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&&(~ 3 &,& -4~) 
% (c,d)
&&(~ 5 &,& 1~)
\end{array}
\\\\\\
% slope = m
slope = m\implies 
\cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{1-(-4)}{5-3}\implies \cfrac{1+4}{5-3}\implies \cfrac{5}{2}
\\\\\\
% point-slope intercept
\stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-(-4)=\cfrac{5}{2}(x-3)\implies y+4=\cfrac{5}{2}x-\cfrac{15}{2}$

$\bf y=\cfrac{5}{2}x-\cfrac{15}{2}-4\implies y=\cfrac{5}{2}x-\cfrac{23}{2}\impliedby 
\begin{array}{llll}
\textit{now let's multiply both}\\
\textit{sides by }\stackrel{LCD}{2}
\end{array}
\\\\\\
2(y)=2\left( \cfrac{5}{2}x-\cfrac{23}{2} \right)\implies 2y=5x-23\implies \stackrel{standard~form}{-5x+2y=-23}
\\\\\\
\textit{and if we multiply both sides by -1}\qquad 5x-2y=23$

side note: multiplying by the LCD of both sides is just to get rid of the denominators

5 0

2 years ago

Can someone please help<br><br>find slope/rate of change <br>a. 1/3<br>b. 3<br>c. 30<br>d. 10

Lera25 [3.4K]

Answer:

Answer should be 1/4, since it's not there I would suggest 1/2.

Step-by-step explanation:

Its rise/run therefore it going up one and moving four.

3 0

2 years ago

Rate of change and initial value for y=1/2+2

abruzzese [7]

Answer:

fate of change = 1/2, initial value = 2

Step-by-step explanation:

assuming the x is after the 1/2,

currently in slope intercept form, so we don't need to change anything (y=mx+b)

rate of change is 1/2, initial value = 2

5 0

1 year ago