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Sholpan [36]
3 years ago
9

Which mapping shows a function

Mathematics
1 answer:
Alja [10]3 years ago
4 0
The second one because there is all the inputs are different. There is one input for every output.
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Express 4/5 as a percent. Make sure to label your answer with %.
miv72 [106K]
I’m pretty sure it’s 80%
7 0
3 years ago
a surveyor measures the distance to the two landmarks as shown in the diagram what is the distance d. between the landmarks​
Inessa [10]
<h3>The distance between two landmarks is 123 meters</h3>

<em><u>Solution:</u></em>

We have to find the distance between two landmarks

<em><u>Use the law of cosines</u></em>

The third side of a triangle can be found when we know two sides and the angle between them

c^2 = a^2 + b^2 - 2ab\ cos c

Here, angle between 90 meters and 130 meters is 65 degrees

From figure,

a = 90

b = 130

c = d

Therefore,

d^2 = 90^2 + 130^2 - 2(90)(130)\ cos 65\\\\d^2 = 8100 + 16900 - 23400\ cos\ 65\\\\d^2 = 25000 - 23400 \times 0.4226\\\\d^2 = 25000 - 9889.267\\\\d^2 = 15110.73\\\\d = 122.92\\\\d \approx 123

Thus, the distance between two landmarks is 123 meters

8 0
3 years ago
Evaluate the exponent expression 3x–4 ⋅ xy2 for x = –1 and y = 2.
ddd [48]

Answer:

48

Step-by-step explanation:

Given,

x = - 1

y = 2

To find : The value of 3x - 4 ⋅ xy² ?

Substitute the given values of x and y in the expression 3x - 4 ⋅ xy².

3x - 4 ⋅ xy²

= 3 ( - 1 ) - 4 ⋅ ( - 1 ) ( 2 )²

= - 3 - 4 ⋅ - 1 ( 4 )

= - 12 ⋅ - 4

= 48

Note : -

When a negative number gets multiplied with a negative, the resulted number is a positive number.

8 0
3 years ago
River C is 300 Miles Longer than River D. If the sum of their lengths is 5,570 miles, what is the length of each river?
d1i1m1o1n [39]
x-\ length\ of\ river\ D\\&#10;x+300-\ length\ of\ river\ C\\\\&#10;5570=x+x+300\\&#10;5570=2x+300\ \ \ | subtract\ 300\\5270=2x\ \ \ | divide\ by\ 2\\x=2635\\\\&#10;River\ C\ is\ 2935miles\ long\ and\ river\ D\ 2635\ miles\ long.
6 0
3 years ago
PLS HELP
Naya [18.7K]
I did the work for you but the answer would be 1 second

5 0
3 years ago
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