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olasank [31]
3 years ago
9

Flying with the wind a plane went 198 mph. Flying into the same wind the plane only went 162 mph. Find the speed of the plane in

still air and the speed of the wind
Mathematics
1 answer:
olganol [36]3 years ago
4 0

Answer: speed of plane in still air is 180 miles per hour

speed of the wind is 18 miles per hour

Step-by-step explanation:

Flying with the wind, the plane went 198 miles per hour. This means if was flying in the same direction with the wind. This is same as the speed in still air because there was no opposition from the wind.

Flying into the same wind the plane only went 162 mph. This means that the plane flew against the wind

Let x = the speed of the plane

Let y = the speed of the wind

when flying with the wind,

x + y = 198 - - - - - - -1

When flying against the wind,

x - y = 162 - - - - - - - -2

Subtracting equation 2 from equation 1,

y - - y = 198 - 162

2y = 36

y = 36/2 = 18 miles per hour

x = 198 - y = 198 -18

x = 180 miles per hour

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A hot air balloon descends 15 feet each minute after having reached an altitude of 362 feet above the ground. What is the altitu
salantis [7]

Answer:

182 feet

Step-by-step explanation:

The equation that describes the motion of the hot air ballon is:

h(t) = h_0 - vt

where:

h_0 is the initial altitude

v is the rate of descend of the balloon

t is the time

The balloon starts from a height of

h_0 = 362 ft

and has a rate of descend of

v=15 ft/min

Therefore, after time

t = 12 min

Its altitude will be

h(12)=362 - (15)(12)=182 ft

8 0
3 years ago
Find the slope of the following points
Ierofanga [76]

Answer:

24) -1

25) indefinite/infinite

26) indefinite/infinite

27) 7/3

Step-by-step explanation:

24)

\frac{4-2}{-3+1}\\= 2/-2\\= -1\\

25)

\frac{10+2}{5-5}\\\\= \frac{12}{0}

= indefinite/infinite

26)

indefinite/infinite

27)

\frac{16-9}{11-8}\\\\= \frac{7}{3}\\

<em>Feel free to mark this as brainliest! :D</em>

5 0
2 years ago
34
Vadim26 [7]

Answer:

They are similar by the definition of similarity in terms of a dilation

Step-by-step explanation:

The given vertices of triangle ΔABC are;

A(1, 5), B(3, 9), and C(5, 3)

The vertices of triangle ΔDEF are;

D(-3, 3), E(-2, 5), and F(-1, 2)

Therefore, we get;

The length of segment, \overline{AB} = √((9 - 5)² + (3 - 1)²) = 2·√5

The length of segment, \overline{BC} = √((9 - 3)² + (3 - 5)²) = 2·√10

The length of segment, \overline{AC} = √((5 - 3)² + (1 - 5)²) = 2·√5

The length of segment, \overline{DE} = √((5 - 3)² + (-2 - (-3))²) = √5

The length of segment, \overline{EF} = √((2 - 5)² + (-1 - (-2))²) = √10

The length of segment, \overline{DF} = √((2 - 3)² + (-1 - (-3))²) = √5

∴ \overline{AB}/\overline{DE} = 2·√5/(√5) = 2

\overline{BC}/\overline{EF} = 2·√10/(√10) = 2

\overline{AC}/\overline{DF} = 2·√5/(√5) = 2

The ratio of their corresponding sides are equal and therefore;

ΔABC and ΔDEF are similar by the definition of similarity in terms of dilation.

4 0
3 years ago
Need help ASAP! Please help with the slope to this question m= <br> B=
Inessa [10]

y=mx+b

therefore m = 1/2

and b = -6

7 0
2 years ago
a survey mr thrones class shows that 5 out of 8 students will by lunch how many out of 720 students in the school will buy lunch
never [62]

5/8 that's how ratio of students that will buy lunch. so in order to find number students who will buy the lunch out of 720, just multiply 720 with 5/8 ie, 720x5/8 ie 450.

450 is answer

8 0
2 years ago
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