How to find an acute angle between two lines?

If x2 + nx + 18 = (x + 9) (x + 2), what is the value of n?

A car completes a journey of 570 km at an average speed of 75 km/h calculate the time taken for the journey in hours and minutes

Given the function g (x) = b (-5x + 1) 6 - a, where a ≠ 0 and b ≠ 0 are constants. A. Find g′ (x) and g′′ (x). B. Prove that g is monotonic (this means that either g always increases or g always decreases). C.

The polynomial x3 + 64 is an example of a -sum of cubes -difference of cubes -difference of squares -perfect-square trinomial

A pyramid has a surface area of 648 m2. It is to be enlarged by a scale factor of 3. The surface area of a scaled figure equals the original surface area times the square of the What is the surface area of the enlarged pyramid?

Por que es importante que los científicos desarrollen una forma de hacer los tejidos que se han construido en el sistema de suministro de sangre

5{-3.4k-7} + {3k+21}

How do u solve 131 + 16x = - 331 + 5x

What is 27 divided by 9?

A researcher believes that headaches can be relieved by drinking water flavored by mint leaves. So the researcher asks a group at the hospital to participate in a study in which the researcher gives half of the participants in the study just plain