What are two common uses of igneous rocks?

given extra points!

5/6+7/8what is the answer sealsdbdbshd

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Multiply and simplify. (x - 4) (x^2 – 5x – 6) i will mark brainliest if your answer is right. show how you got the answer. if your answer is correct but does not show how you got the answer you will not be marked brainliest.