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D. (2,1)

Step-by-step explanation:

I will be using substitution method as it is faster.

Then substitute x = 2 in any given equations.

I will use the second equation to substitute in.

Therefore, when x = 2, y = 1.

We can write as the coordinate point which is (2,1).

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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