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VashaNatasha [74]
3 years ago
15

A car travels for 3 hours at an average speed of 45mph how far does it travel

Mathematics
1 answer:
grandymaker [24]3 years ago
8 0
135 miles in 3 hours
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Patricia is riding a bus to her grandmother's, 66 miles away. On a map with a scale of 2 inches equals 12 miles, what is the dis
Genrish500 [490]
The answer is 5.5 because 66/12= 5.5, hope this helps..
7 0
3 years ago
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Where should the point P be chosen on line segment AB so as to maximize the angle θ? (Assume a = 4 units, b = 5 units, and c = 9
taurus [48]
From the figure, let the distance of point P from point A on line segment AB be x and let the angle opposite side a be M and the angle opposite side c be N.

Using pythagoras theorem,
\tan M= \frac{a}{b-x} \\ \\ M=\tan^{-1}\left(\frac{a}{b-x}\right)
and
\tan N= \frac{c}{x} \\ \\ N=\tan^{-1}\left(\frac{c}{x}\right)

Angle θ is given by
\theta=180-M-N \\  \\ =180-\tan^{-1}\left(\frac{a}{b-x}\right)-\tan^{-1}\left(\frac{c}{x}\right)

Given that a = 4 units, b = 5 units, and c = 9 units, thus
\theta=180-\tan^{-1}\left(\frac{4}{5-x}\right)-\tan^{-1}\left(\frac{9}{x}\right)

To maximixe angle θ, the differentiation of <span>θ with respect to x must be equal to zero.
i.e.
\frac{d\theta}{dx} = -\frac{4}{x^2-10x+41} + \frac{9}{x^2+81} =0 \\  \\ -4(x^2+81)+9(x^2-10x+41)=0 \\  \\ -4x^2-324+9x^2-90x+369=0 \\  \\ 5x^2-90x+45=0 \\  \\ x^2-18x+9=0 \\  \\ x=9\pm6 \sqrt{2}

Given that x is a point on line segment AB, this means that x is a positive number less than 5.

Thus
x=9-6 \sqrt{2}=0.5147

Therefore, The distance from A of point P, so that </span>angle θ is maximum is 0.51 to two decimal places.
6 0
3 years ago
Solve for x :)<br> 6x + 4x – 6 = 24 + 9x
Blababa [14]

Answer:

x=30

Step-by-step explanation:

6x+4x-6=24+9x

combine like terms

10x-6=24+9x

add 6 on both sides

10x=30+9x

subtract 9x on both sides

x=30

Hope this helps! :)

5 0
3 years ago
Express<br> ln3+2lnx <br> as a single logarithm
Naily [24]

Answer:

ln (3x^2)

Step-by-step explanation:

ln3 + 2ln(x)

= ln3 + ln(x^2)

= ln (3x^2)

4 0
2 years ago
Bob needs to mix 2 cups of orange juice concentrate with 3.5 cups of water to make orange juice. bob has 6 cups of concentrate.
tiny-mole [99]
6/2 = 3 

<span>3 * 3.5 = 11.5 </span>

<span>11.5 + 3 = 14.5 cups of juice

</span>
6 0
2 years ago
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