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Oliga [24]
3 years ago
15

What is the solution to the system of equations? Use the substitution method to solve. 6=−4x+y−5x−y=21 Enter your answer in the

boxes.
Mathematics
1 answer:
miss Akunina [59]3 years ago
5 0

Answer:

x=-3 and y= -6

Step-by-step explanation:

we have

6=-4x+y and -5x-y = 21

6+4x=y we substitute y in the second equation

-5x-(6+4x)=21

-9x-6=21

-9x=27

x=-3

we substiture x in the second

-5(-3)-y =21

15-y=21

15-21=y

y=-6

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Bumek [7]
If you mean (3n-2m)^2 then the answer is
9n^2-12mn+4m^2
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What is the slope of the line?
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C, -2

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5 0
3 years ago
Perform the indicated operation.(7 - 11/) + (-3 + 5/)
den301095 [7]

Answer:

<u>The correct answer is C. 4 -6</u>

Step-by-step explanation:

Let's solve the operation given, this way:

(7 - 11/) + (-3 + 5/)

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4 0
3 years ago
on a number line the coordinates of x, y, z, and w are -6, -3, 1 and 4 respectively find the lengths of the two segments below t
exis [7]

The lengths of the two segments below then tell whether they are congruent

YZ = 4

XW = 12

not congruent

This is further explained below.

<h3>What is a number line?</h3>

Generally, A number line is a depiction of a graded straight line that serves as an abstraction for real numbers, which are symbolized by the

Number lines are used in introductory mathematics. It is generally accepted that a real number may be assigned to each point on a number line and that each point can be assigned to a real number.

YZ = Z - Y = 1 -(-3) = 4

XW = W -X = 5 -(-7) = 12

Because the segments are not the same length, they cannot be considered congruent.

In conclusion, It is self-evident that segment YZ will not have the same length as segment XW since it is just a portion of the latter.

Read more about the number line

brainly.com/question/13189025

#SPJ1

7 0
1 year ago
A proton moves at 5.20 105 m/s in the horizontal direction. It enters a uniform vertical electric field with a magnitude of 8.40
lozanna [386]

Answer:

  86.5 ns

Step-by-step explanation:

The speed in the original direction (horizontally) is unchanged by the vertical force the field exerts. The travel time is ...

  time = distance/speed = (4.5×10^-2 m)/(5.20×10^5 m/s) = 8.65×10^-8 s

_____

An engineer would express this time using the SI prefix nano- for 10^-9. The time is 86.5 ns.

7 0
3 years ago
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