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Lera25 [3.4K]
3 years ago
11

Slope between(-1,-6) and (2,-12)

Mathematics
2 answers:
blagie [28]3 years ago
7 0

Answer:

-2

Step-by-step explanation:

vova2212 [387]3 years ago
7 0

Answer:

-2

Step-by-step explanation:

change over y  -12 - -6      -6

change over x     2- -1        3

simplify it -6/3  -> -2

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2x - 3y = 9; 2x + y = 13
olga2289 [7]

Answer:

See explanations below

Step-by-step explanation:

Given the simultaneous equations;

2x - 3y = 9... 1

2x + y = 13 ... 2

From 2;

y = 13-2x

Substitute into 1;

2x - 3(13-2x) = 9

2x -39 + 6x = 9

8x - 39 = 9

8x = 9+39

8x = 48

x = 6

Since y  = 13-2x

y = 13-2(6)

y = 13-12

y = 1

The soluton to the system of equation is (6, 1)

Given the equations;

99x + 101y = 499; .... 1 * 101

101x + 99 y = 501 ... 2 * 99

______________

9999x + 10,201y = 50,399

9999x + 9801y = 49,599

Subtract

10201y - 9801y = 50399-49599

400y = 800

y = 2

Substitute y = 2 into 1;

From 1;

99x + 101y = 499

99x + 101(2) =499

99x +202 = 499

99x = 499 - 202

99x = 198

x = 198/99

x =2

Hence the solution is (2,2)

For the equations;

49x - 57y = 172 .... * 57

57x - 49y = 252 __ * 49

____________________

2793x -3249y =  9804

2793x - 2401y = 12348

Subtract

-3249y+2401y = 9804-12348

-848y = -2544

y = 3

Substitute into 1;

49x - 57y = 172

49x - 57(3) = 172

49x - 171 = 172

49x = 171+172

49x = 343

x = 7

Hence the solution is (7, 3)

8 0
2 years ago
Write an expression to represent: Eight more than the product of two and a number x.
boyakko [2]

Answer:

2x+8

Step-by-step explanation:

The number is x

product of two and a number x

2x

Eight more than

2x+8

3 0
3 years ago
Read 2 more answers
I am very confused pls help|w+5|>5
SIZIF [17.4K]

Answer:

on what do you need help in

4 0
3 years ago
Anyone that can help me with this?
Flauer [41]
Okay. 10×5=50cm^2 is the area of the rectangle
The height of the triangle is (18-10)=8cm
So (8×5)÷2=20cm^2
50+20=70cm^2 is the area of the composite shape
8 0
3 years ago
Read 2 more answers
the length of a rectangle is 3 cm more than twice its width. Find the largest possible width if the perimeter is at most 66cm
Vanyuwa [196]
If you let the width be x, then the length will be 2x + 3. The perimeter P is twice the width plus twice the length, i.e., P = 2*x + 2*(2x + 3) = 2x + 4x + 6 = 6x + 6. So if the perimeter is 66 cm then 66 = 6x + 6 ---> 6x = 60 ---> x = 10 cm., and so if the perimeter is at most 66 cm., the width can be at most 10 cm..
6 0
3 years ago
Read 2 more answers
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