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LuckyWell [14K]
3 years ago
11

Y = 4x + 6 ; 5x + y = -21

Mathematics
1 answer:
kobusy [5.1K]3 years ago
5 0

Answer:

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

=9x -15

= -6x

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6 (r - 4) + r + 30 - 7r
GrogVix [38]
6r-24+r+30-7r (the we divide the regular numbers on one side and the others on the other side)Like this:
(6r+r-7r)+(-24+30)
(7r-7r)+6
And the final answer is 6
8 0
3 years ago
Combine any like terms in the expression. If there are no like terms, rewrite the expression.
AlladinOne [14]
Im correct ok ik i am

8 0
2 years ago
5x-3y when x=7 and y=-8
I am Lyosha [343]
5 (7) - 3 (-8)

35 - -24

Because two negatives equal a positive the subtraction sign will change into an addition sign.

35+24

So your answer will be 59.

Hope this helped :)
5 0
3 years ago
The angle of elevation of the top of a tower from a point 100m away is 45 degrees. What is the height of the tower to the neares
OLEGan [10]
<h3>Answer: 100 meters</h3>

===========================================

Explanation:

If you draw out the diagram, then you'll find that a 45-45-90 triangle forms. The nice thing about this type of triangle is that the two legs are always the same length. The horizontal leg is 100 meters, so the vertical leg must also be 100 meters.

Side note: this type of triangle is an isosceles right triangle.

---------

You could use the tangent rule to get the same thing

tan(angle) = opposite/adjacent

tan(45) = 100/x

1 = 100/x

1*x = 100

x = 100

In this case, the opposite leg is the vertical leg since it is furthest from the angle of elevation.

5 0
3 years ago
Read 2 more answers
What is the solution of the system? y=2 x= -1
kodGreya [7K]

Answer:

( -1,2)

Step-by-step explanation:

The solution is where the two lines intersect

The intersect at x=-1 and y=2

( -1,2)

5 0
3 years ago
Read 2 more answers
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