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3 years ago

X = 3y-9 Solve for y, now i need a refresher on this mind helping me?

Mathematics

1 answer:

Gala2k [10]3 years ago

5 0

Answer:

Is this all? You can’t obtain a number value for y, but you can obtain that y equals (9+X)/3

Step-by-step explanation:

X=3y-9

Distribute the right hand side.

3y-9=3(y-3)

Therefore,

X=3(y-3)

Divide both sides by 3

(X/3)=y-3

Add 3 to both sides

(X/3)+3=y

Simplify

(X/3)+(9/3)=y

y=(9+X)/3

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3 years ago

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4 years ago

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3 years ago

NEED HELP! ASAP! 50 POINTS!

Lerok [7]

Answer:

$y=13\text{ miles per gallon}$

Step-by-step explanation:

We have the two points: (0, 11) and (3, 50).

And we want to find the rate of change in y relative to x, where x is the gallons and y is the miles.

In simple terms, we want to find the slope between the two points.

So, let's use the slope formula:

$m=\frac{y_2-y_1}{x_2-x_1}$

Let (0, 11) be (x₁, y₁) and let (3, 50) be (x₂, y₂). Substitute. Let's also put "miles" in the numerator with the Ys and "gallons" in the denominator with the Xs. This yields:

$y=\frac{50-11\text{ miles}}{3-0\text{ gallons}}$