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Brums [2.3K]
3 years ago
15

1. 100 kilometers at 20 km/h?

Mathematics
2 answers:
hodyreva [135]3 years ago
8 0

Answer:

1. 5 hours

2. 4 hours

Reason:

Formula for speed is speed = \frac{distance}{time} , if you want to find time, then take distance / speed, which will equal to 100 / 20 = 5 hours, and the same with 2.

puteri [66]3 years ago
6 0

\\ \rm\hookrightarrow Speed=\dfrac{Distance}{Time}

\\ \rm\hookrightarrow Time=\dfrac{Distance}{Speed}

So

#1

\\ \rm\hookrightarrow Time=\dfrac{100}{20}=5h

#2

\\ \rm\hookrightarrow Time=\dfrac{180}{45}=4h

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Find the equation of the line through point (-5,5) and perpendicular to y = 5/9x - 4
tankabanditka [31]

Answer:

9x+5y=-20

Step-by-step explanation:

y = \frac{5}{9} x - 4

compare with that y=mx+c

where m=slope .

So after comparing we get m=\frac{5}{9}

As the lines are perpendicular

m1*m2=\ -1

m2 \ =\ \frac{-1}{m1}

therefore m2=\frac{-9}{5}

Now from the equation

y - b = m(x - a ) this equation passing to the point (-5,5) with m=\frac{-9}{5}

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Therefore equation is

9x+5y=-20

7 0
4 years ago
Consider a small ferry that can accommodate cars and buses. The toll for cars is $3, and the toll for buses is $10. Let X and Y
harina [27]

Answer:

Expected revenue from the single trip is $ 13.14

Step-by-step explanation:

                              y

p(x,y)                   0               1                                 2                g(x)

x    0           0.025              0.015                       0.010            0.05

1                  0.050            0.030                        0.020           0.1  

2                   0.115             0.075                        0.050           0.24

3                  0.150              0.090                      0.060             0.3

<u>4                   0.100             0.060                     0.040              0.2 </u>

h(y)              0.325              0.27                       0.18  

E (x+Y) = E(X) +E(Y)

E(X)= ∑ xi g(x)i

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Expected revenue from the single trip is $ 13.14

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