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3 years ago

12

A density graph for all the possible speeds between 0 mph and 320 mph is in the shape of a triangle. What is the height of the t

riangle?
A. 0.025
B. 0.0125
C. 0.003125
D. 0.00625

2 answers:

Inessa [10]3 years ago

6 0

Answer:

its C

Step-by-step explanation:

Shalnov [3]3 years ago

5 0

Answer:

D. 0.00625

Step-by-step explanation:

A P E X

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A train decreased its speed by 72 miles hour in 12 minutes. Find the average change in speed per minute.

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6 mph

Step-by-step explanation:

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To solve this problem you have to convert the percentage to a decimal which would
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3 years ago

Identify each of the following as rational or irrational

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√23-irrational
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1 year ago

What is 4/8 as a precent

kotykmax [81]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

kodGreya [7K]

Answer:

$y=-2\,(x+3)^2-3$

Step-by-step explanation:

Notice that they are asking you to write the equation of the parabola in vertex form, that is using the coordinates of the vertex $(x_v,y_v)$ in the expression:

$y-y_v=a\,(x-x_v)^2\\y=a\,(x-x_v)^2+y_v$

we can start by directly replacing the given vertex coordinates (-3, -3) in the expression, and then using the extra info on the point the parabola goes through in order to find the parameter $a$ :

$y=a\,(x-x_v)^2+y_v\\y=a\,(x+3)^2+(-3)\\y=a\,(x+3)^2-3\\-5=a\,(-2+3)^2-3\\-5=a\,(1)-3\\a=-5+3\\a=-2$

So, now we can write the full expression for the parabola:

$y=a\,(x+3)^2-3\\y=-2\,(x+3)^2-3$

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3 years ago