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Naily [24]
3 years ago
7

In two or more complete sentences, describe how the substitution method works for solving a two-order system of equations.

Mathematics
2 answers:
padilas [110]3 years ago
8 0
The first step is to set one equation equal to x or equal to y.
Ex. y = ..... or x = .....
The next step is to substitute that equation into the second equation in place of the x (or y), whichever you set it equal to.

Ex. x + y = 3
     2x + y = -1

y = -x + 3      2x + (-x + 3) = -1
                       x + 3 = -1
                       x = -4
y = -(-4) + 3    y = 7    (-4,7)
avanturin [10]3 years ago
5 0

Answer:

The first step is to set one of the equation equal to x or y. Then substitute this value into the other equation to find the value of the other variable. Finally, put the value obtained into the relation taken at the start.

Step-by-step explanation:

Let us consider an example,

3x + y = 8

x + y = 6.

The first step is to set one of the equation equal to x or y.

i.e. x = 6 - y.

Next step is to substitute this value into the other equation.

i.e. 3×(6-y) + y = 8

i.e. 18 - 3y + y = 8

i.e. -2y = -10

i.e. y = 5.

Finally, we put this value of y into the relation taken at the start

i.e. x = 6 - y

i.e. x = 6 - 10

i.e x = 4.

Hence, the solution of this system of equations using substitution method is (x, y) = ( 4, 5).

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A pizzeria sells a round pizza with a diameter of 16 inches. Another pizzeria sells a large square pizza with a side length of 1
ankoles [38]

Answer:

pizzeria1

Step-by-step explanation:

Given data

pizzeria1

Diameter=16in

Radius= 16/2= 8in

Area= πr^2

Area= 3.132*8^2

Area= 201.09 in^2

pizzeria2

Diameter=15in

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Area= πr^2

Area= 3.132*7.5^2

Area= 176.74n^2

4 0
3 years ago
One number is six times as large as another. The sum of their reciprocal is 7. What are the numbers
RideAnS [48]
X=6y

sum of their reciprocals
(1/x)+(1/y)=7
x=6y
1/6y+1/y=7
1/6y+6/6y=7
7/6y=7
times both sides by 6y
7=42y
divide both sides by 42
1/6=y

x=6y
x=6(1/6)
x=6/6
x=1

the numbers are 1 and 1/6
5 0
3 years ago
3) You owe $1,842.66 on a credit card at a 14.5% APR. You pay $250.00 at the beginning of the month and put another $250.00 in a
Wittaler [7]

3. Credit Card: (1842.66 - 250) (.145/12) = $19.24

Savings: 250(0.04/12) = $0.83  

Difference = 19.24 - 0.83 = $18.41  

4. Credit Card: (1842.66 - 500) (.145/12) = $16.22

You will save $18.41 - $16.22 = $2.19 by putting all $500 toward the higher credit card rate.  

8 0
3 years ago
Read 2 more answers
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Annette [7]

Answer:

B. 2x2y(x – 3y)(x + 3y)

Step-by-step explanation:

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5 0
3 years ago
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Can someone help me plot this please.
deff fn [24]
This graph below has your answer

5 0
3 years ago
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