Using the quadratic formula to solve x2 + 20 = 2x, what are the values of x?
1+ V21
O-17 191
O 1+2./197
O 17 191

by Quadratic formula , , values of x are . None of mentioned options are correct according to question!

Step-by-step explanation:

Here we have , expression  x2 + 20 = 2x or , .

We know that Quadratic formula is :

⇒

Putting this value in equation :

⇒

⇒

⇒

⇒

⇒

Therefore , by Quadratic formula , , values of x are . None of mentioned options are correct according to question!

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.