Mathematics: Solve using the qudratic formula 5×+8=3×2 and then round the answer to the nearest hundredth

The gratuity is about 20% of $40, which is $8. The tax is about 10% of $40, which is $4. So, the total cost is about $40 + $8 + $4 = $52.Step-by-step explanation:...

Solve using the qudratic formula 5×+8=3×2 and

Ответ:

aallyssabrown0120

16.01.2022

Mathematics

x = 0.17 or x = -3.5

Step-by-step explanation:

The quadratic formula states $\frac{-b±\sqrt{b^{2}-4ac } }{2a}$

We can then rearrange the equation given.

subtract 3 $x^{2}$ from both sides to get -3 $x^{2}$ +5x+8=0

From this you can see that our "a" term is -3 $x^{2}$ , our "b" term is 5x, and our "c" term is 8. (The "a" term always has the exponent in it, the "b" has just the variable and the coefficient, and the "c" is just a number)

We can then plug those numbers into our equation to get $\frac{-(5x)±\sqrt{5^{2}-4(-3)(8) } }{2(-3)}$