Which of these strategies would eliminate a variable in the system of equations? \begin{cases} 5x + 3y = 9 4x - 3y = 9 \end{cases}
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5x+3y=9
4x−3y=9
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Evaluate cos2θ for cosθ = square root of 3/2

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

Abcd is a square. what is the measure of angle bac