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balu736 [363]
3 years ago
13

Which ordered pair is a solution to the equation 2x - 4y = 18?

Mathematics
2 answers:
cestrela7 [59]3 years ago
7 0

Answer:  The correct option is (D) (11, 1).

Step-by-step explanation:  We are given to select the correct ordered pair that is a solution to the following equation :

2x-4y=18~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)

If an ordered par is a solution to the given equation (i), it must satisfy the equation.

(A) (-1, 4).

For x = -1  and  y = 4, we have

L.H.S.=2x-4y=2\times(-1)-4\times4=-2-16=-18\neq 18\\\\\Rightarrow L.H.S.\neq R.H.S.

So, the ordered pair (-1, 4) is NOT a solution to equation (i).

(B) (0, 4).

For x = 0  and  y = 4, we have

L.H.S.=2x-4y=2\times0-4\times4=0-16=-16\neq 18\\\\\Rightarrow L.H.S.\neq R.H.S.

So, the ordered pair (0, 4) is NOT a solution to equation (i).

(C) (9, 2).

For x = 9  and  y = 2, we have

L.H.S.=2x-4y=2\times9-4\times2=18-8=10\neq 18\\\\\Rightarrow L.H.S.\neq R.H.S.

So, the ordered pair (9, 2) is NOT a solution to equation (i).

(D) (11, 1).

For x = 11  and  y = 1, we have

L.H.S.=2x-4y=2\times11-4\times1=22-4=18\\\\\Rightarrow L.H.S.\neq R.H.S.

So, the ordered pair (11, 1) is a solution to equation (i).

Thus, the correct option is (D).

weqwewe [10]3 years ago
5 0
(11,1) because if you plug in x and y this answer is the only one that gives you 18 in the end
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Step-by-step explanation:

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The rule of the compounded interest is A = P(1+\frac{r}{n})^{nt}, where

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The interest I = A - P

∵ Each account start with $200

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∴ n = 1 ⇒ compounded annually

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