Determine the exact value of each of the following expressions. Your answers should involve fractions and square roots, and not decimal values. cos(45∘)=

sin(45∘)=

tan(45∘)=

cos(π/4)=

sin(π/4)=

tan(π/4)=

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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.

Which of these statements is correct? the system of linear equations 6x - 5y = 8 and 12x - 10y = 16 has no solution. the system of linear equations 7x + 2y = 6 and 14x + 4y = 16 has an infinite number of solutions. the system of linear equations 8x - 3y = 10 and 16x - 6y = 22 has no solution. the system of linear equations 9x + 6y = 14 and 18x + 12y = 26 has an infinite number of solutions.

Find the value of x to the nearest tenth. a. 4.5 b. 5.4 c. 6.3 d. 7.2