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3 years ago

2.3y=12please explain how you solved

2 answers:

5 0

Divide the 2.3 by the 12 to move it to the right of the equal sign and make it cancel out on the left side.
Answer is y = 5.23
That's rounded to the hundredths place.

Mariana [72]3 years ago

3 0

1. divide both sides by 2.3y=12

y=12/2.3

2. simplify 12/2.3

which then you will get y=5.217391

hopefully this helps

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2 years ago

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8 0

3 years ago

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Use the quadratic function f(x) = 2x^2 + 4x - 15. Find any x intercepts.

8_murik_8 [283]

So for this function we will be using the quadratic formula, which is $x=\frac{-b+\sqrt{b^2-4ac}}{2a},\frac{-b-\sqrt{b^2-4ac}}{2a}$ , to solve. a = x^2 coefficient, b = x coefficient, and c = constant. Using our equation, we can solve for the zeros (x-intercepts) as such:

$x=\frac{-4+\sqrt{4^2-4*2*(-15)}}{2*2},\frac{-4-\sqrt{4^2-4*2*(-15)}}{2*2}\\ \\ x=\frac{-4+\sqrt{16-(-120)}}{4},\frac{-4-\sqrt{16-(-120)}}{4}\\ \\ x=\frac{-4+\sqrt{136}}{4},\frac{-4-\sqrt{136}}{4}\\ \\ x=1.92,-3.92$

In short, your x-intercepts (rounded to the hundredths) are (1.92,0) and (-3.92,0).

6 0

3 years ago