Solve for x in the equation 3x^2-18x+5=47

≅ (rounded to 2 decimal places)

Step-by-step explanation:

This is a quadratic equation :

Bringing everything to left side:

We can use the quadratic formula to find the value(s) of x:

Quadratic Formula:

and

Where,

For our question we have:

Plugging in all the values we get:

This is approximately 7.80

and

This is approximately -1.80

So, ≅

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet