What is the value of x?
sin 49° = cos x
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X=

Can i get some on 18,20,& 22? or one of them

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

How is working backward similar to solving an equation?