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kakasveta [241]
3 years ago
10

Use the direct variation equation. If y=20 when x=-5. Find x when y=-1.

Mathematics
1 answer:
Olenka [21]3 years ago
5 0

Answer:

-1/4

Step-by-step explanation:

y=x

y=20

x=5

y=_x

20=k(5)

20/5=4

k=4

-1=4(x)

-1/4=x

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The number of students who chose lunch was 5 more than the number of students who chose breakfast. Write a system of linear equa
Papessa [141]

Answer:

The system of linear equations are y=5+x and  x+y=25

Step-by-step explanation:

Given : The number of students who chose lunch was 5 more than the number of students who chose breakfast. Let x represent the number of students who chose breakfast and y represent the number of students who chose lunch.

(50 students picked, 25 picked dinner the rest picked lunch and breakfast)

To find : Write a system of linear equations that represents the numbers of students who chose breakfast and lunch ?

Solution :

The number of students who chose breakfast be 'x'

The number of students who chose lunch be 'y'.

The number of students who chose lunch was 5 more than the number of students who chose breakfast.

i.e. y=5+x

Now, Total student were 50 and 25 picked dinner the rest picked lunch and breakfast i.e. 25.

So, x+y=25

Therefore, the system of linear equations are y=5+x and  x+y=25

4 0
3 years ago
7x + y = 13<br> 4x – 4y = -20
aalyn [17]

Answer: (x,y) = (1,6)

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Find the slope of the line that passes through (3, 11) and (10, 6).
igomit [66]

Answer:

-5/7

Step-by-step explanation:

remember slope is eqaul to rise over run.

6-11 = -5 so it rose down by 5 units

10 - 3 = 7 so it ran 7 units

thus

slope= -5/7

5 0
2 years ago
Evaluate 4 - 2(a2 – b2)2 when a = 3 and b = 2.
Anton [14]

Answer:

-46

Step-by-step explanation:

4 - 2(a^2 – b^2)^2 =

= 4 - 2(3^2 – 2^2)^2

= 4 - 2(9 - 4)^2

= 4 - 2(5)^2

= 4 - 2(25)

= 4 - 50

= -46

6 0
3 years ago
Read 2 more answers
X^(2)-3x+14 how many solutions does it have?
myrzilka [38]

Step by step:

x(2)−3x+14

=2x+−3x+14

Combine Like Terms:

=2x+−3x+14

=(2x+−3x)+(14)

=−x+14

Answer:

=−x+14

For some reason I could only find one... sorry!

Hope I could help thou! :)

 


6 0
3 years ago
Read 2 more answers
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