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sasho [114]
3 years ago
11

PLEASE HELP ME PLESE

Mathematics
2 answers:
NARA [144]3 years ago
8 0
Solve the following system of equations by using the substitution method.
2x – 3y = -1
y = x – 1

<span> (4, 3)|

</span>Solve the following system of equations by using the substitution method.
3y – 2x = 11
y + 2x = 9

<span> Inconsistent|

</span>Solve the following system of equations by using the elimination method.
-2x + 9y = -13
6x – 3y = 15

<span> (2, -1)
|
</span>Solve the following system of equations by using the elimination method.
x – y = 11
2x + y = 19

<span> (10, -1)
|
</span>Solve the following system of equations using matrices.
4x + 5y = -7
3x – 6y = 24

<span> (2, -3)
|
</span>Solve the following system of equations using matrices.
x + y = 1
2x + 5y = 4

<span> (1/3, 2/3) 
Here are the ones I can do.</span>
Ostrovityanka [42]3 years ago
8 0

Answer:

1. Independent

2. (4, -1)

3. (4, 3)

4. (2,5)

5. (2, -1)

6. (10, -1)

7. (2, -3)

8. (1/3, 2/3)

9. 4 and 3

10. (4,-1)

Step-by-step explanation:

1.If a system has one or more solution then it is called Consistent system.

If a system has no solution then it is called an Inconsistent system.

If Consistent system has exactly one solution then it is called Dependent

and If the Consistent system has an infinite number of the solution then it is called Independent.

Therefore, If a system has exactly one solution it is called Dependent.

2. The equations we have:

y = -x + 3 and y = -\frac{1}{2}+3

After solving these equations, We get, x = 4, y = -1

3. The substitution method is we substitute the value of x or y from one equation to another equation and solve them.

After solving given equations. We get,

x = 4, y = 3

4. Similarly, We solve both equations, we get

x = 2, y = 5

5. In the Elimination method, firstly we equate either coefficient of x or y in both equations (if either coefficient of x or y is not equal) after that we add or subtract both equations to eliminate one variable and solve them.

After solving given equations. We get,

x = 2, y = -1

9. We get equations,

x+y=7 and 4(7-y) = 5y+1

After solving these we get the value of x and y.

10. The point of intersection is the solution of both equations. Here we see the point of intersection is (4, -1)

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A piece of string 25 and 1/2 inches long will be cut into 3/4 inch pieces how many pieces will there be
olga2289 [7]

you would have 9.375 pieces or 75/8 pieces, depends on how you look at it

6 0
3 years ago
How many times greater is the thickness of a dime than the thickness of a dollar bill? Dime thickness: 0.135 cm Dollar thickness
Mama L [17]
The dime is 12 thicker then your dollar bill
4 0
3 years ago
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Which are the roots of the quadratic function f(b) = 62 – 75? Select two options.
elena55 [62]

Answer:

b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}

Step-by-step explanation:

Given

f(b) = b^2 - 75

Required

Determine the roots

To get the root of the function, then f(b) must be 0;

i.e. f(b) = 0

So, the expression becomes

0 = b^2 - 75

Add 75 to both sides

75 + 0 = b^2 - 75 + 75

75 = b^2

Take square roots of both sides

\sqrt{75} = \sqrt{b^2}

\sqrt{75} = b

Reorder

b = \sqrt{75}

Expand 75 as a product of 25 and 3

b = \sqrt{25*3}

Split the expression

b = \sqrt{25} *\sqrt{3}

b = \±5 *\sqrt{3}

b = \±5 \sqrt{3}

b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}

The options are not clear enough; however the roots of the equation are b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}

4 0
3 years ago
Simplify the product using FOIL. (3x + 4)(2x – 6)
Arturiano [62]

Answer:

6x^2 - 10x - 24

Step-by-step explanation:

  1. Do 3x times 2x which is 6x^2
  2. Do 3x times - 6 which is -18x
  3. Do 4 times 2x which is 8x
  4. Do 4 times - 6 which is - 24
  5. You get 6x^2 - 18x + 8x - 24
  6. Simplyify to get the answer
5 0
3 years ago
Read 2 more answers
Verity's sock drawer contains 9 black socks, 5 white socks, and 6 brown socks. If Verity chooses a sock at random, what is the p
Y_Kistochka [10]

Answer:

14/20.

Step.-by-step explanation:

There are 20  socks in the drawer.

The number which are not brown = 9 + 5 = 14.

So the required probability  = 14/20.

3 0
3 years ago
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