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3 years ago

Help don’t understand it

Mathematics

1 answer:

Lunna [17]3 years ago

7 0

Answer:

Step-by-step explanation:

The domain is the interval of x numbers. In this case the x values go from 0 to 10.

We know 10 is the maximum because they have said so as there are only 10 tickets available at a time. Also the graph agrees with that.

So the answers cannot be A or C since there is a limit to the domain.

B cannot be the answer since there cannot be fractional tickets (1 1/2, 5 1/8 etc.). The tickets are countable and they should be whole numbers. Real numbers include fractions, decimals too.

Therefore, the answer is D.

Hope this helps! :)

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3 years ago

Solve the system of equations by substitution 3x+y=9z

poizon [28]

Answer:

x = 1.27

y = 5.18

Step-by-step explanation:

to solve this system of equation by simultaneous equation we say that let

3x+y=9.............................. equation 1

-5x+2y=4 .......................... equation 2

from equation 1

3x+y=9.............................. equation 1

y = 9 -3x.............................. equation 3

substitute the value of y = 9 -3x into equation 2

-5x+2y=4 .......................... equation 2

-5x + 2( 9 -3x) = 4

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collect the like terms

18 - 4 = 6x + 5x

14 = 11x

divide both side by 11

14/11 = 11x/11

x = 14/11

x = 1.27

put the value of x = 1.27 into equation 3

y = 9 -3x.............................. equation 3

y = 9 - 3( 1.27)

y = 9 - 3.82

y = 5.18

to check if you are correct put the value of x and y into either equation 1 or equation 2.

3x+y=9.............................. equation 1

3( 1.27) + 5.18 = 9

3.81 + 5.18 = 9

9 = 9

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3 years ago