Solve for x in the diagram below (plz no links)
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Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

What two criteria are needed for triangles to be similar

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.